Cooler than normal weather continued, with several overnight lows below 10°C. In the southwest, crop heat units (CHUs) are below normal and about 200 below last year on this date. Planting is progressing as soils become fit; however, crop emergence has been slow.
Cereals
Winter wheat is moving into the heading stages with T3 fungicide applications beginning in the southwestern part of the province. Fields further east and north are at the early flag leaf stages. Scouting fields for staging is important for optimum timing. Once 75% of the heads on the main stem reach GS59 (head emergence complete) this is known as “day 0”. The optimum T3 fungicide application timing is shortly after this on “day 2”. Day 2 is the beginning of pollination when anthers are visible on the middle of the wheat head. This timing is critical because this is when the peak number of florets are open and susceptible to infection. While day 2 is the optimum time, T3 fungicides can be applied up to day 6-8 with good efficacy. Fields are more uniform compared to last year which should make timing of application easier. Fusarium head blight and DON development is slow when temperatures are below 9°C; however, as temperatures warm, the potential for high disease pressure also increases, especially with frequent rainfall.
Stripe rust has begun to spread beyond the initial areas where it was believed to have overwintered (Perth County). It has now been found in fields from Chatham through to Palmerston. The best defense against stripe rust is a combination of variety selection, scouting and timely fungicide applications. If a susceptible variety is being grown, there is heavier stripe rust pressure across the field, and the T3 application window is still 7-10 days away, an immediate fungicide application for stripe rust may be warranted (A useful trick is to flag the edges of the infected spot and check every day to five an indication of rate of spread.) A T3 fungicide application can follow at pollination for protection against fusarium head blight. Avoid fungicides containing strobilurins if the wheat is beyond the swollen, head in boot stage. When scouting stripe rust-infected fields ensure you are cleaning your boots and clothing between fields to prevent disease spread. Powdery mildew continues to be present at moderate to high pressure in thick stands or susceptible varieties, but its yield impact is low.
Corn
Planting progress estimates suggest corn is over 90% complete on coarse- and medium-textured soils. Challenges on planting continue on clays, where planting progress is estimated at between 30 to 50% complete. Some silage corn acres will follow winter cereal forage harvest and poor alfalfa stands. Regionally, planting is delayed due to wet conditions in the Northumberland, Hastings, Lennox and Addington and Prince Edward counties.
Yellowing in emerged corn is due to cold stress, not nitrogen or sulphur deficiency. Herbicide application should be assessed field by field, considering weed pressure, product safety, and acreage. Many herbicides have good crop safety, and even stressed, yellow corn can metabolize the herbicide without yield loss – especially when compared to losses from weed competition.
Unless hybrids are known to be herbicide sensitive or the label warns against use under certain environmental conditions (e.g. temperature), prioritize weed control during the critical weed-free period (V1 to V10), particularly when weed pressure is high.
Side-dress nitrogen application has started on the earliest planted corn, which is at the 4 to 5-leaf stage. Although there are adequate supplies of 28% UAN in Ontario, delivery
logistics may require some planning and coordination with fertilizer retail outlets.
Soybeans
Soybean seeding progress varies across regions and soil textures. Some well-drained areas have completed planting, with beans starting to emerge, while wetter parts of the province are still waiting for heavy soils to become fit.
Some replants are occurring due to poor emergence. Prolonged cold, wet conditions can lead to root rots that can affect crop growth even if plants survive.
Applying the wrong herbicide to traited varieties (e.g. Xtend, Xtendflex andEnlist) will result in plant death. To avoid an uninsurable mistake, keep clear, detailed records that are shared with custom spray operators. Variety signs posted at field entrances are helpful. It is also important to ensure the drill is well cleaned before switching varieties.
Forages
Winter cereal forage yields varied with some reporting better than expected yields in the southwest but others with lower-than-expected yields, especially in areas where snow mould was present. Prolonged overcast, and cool, wet conditions have affected forage quality with reduced sugar and higher ash content from “mud splash”.
First cut dairy haylage is just starting. Fields with high grass content, where grasses are heading, should be cut first to maximize quality. Early reports of yields are good, although there has been some lodging in thick stands and/or from heavy rains. Forage digestibility may be lower where cool weather contributed to higher lignin levels.
Edible Beans
Producers are conducting preplant herbicide application for dry beans this week and some fields are being planted while others are waiting for more consistently warm temperatures. The first week of June looks ideal for planting and fast emergence, and Ontario data shows that is the ideal window for planting provided heavy rains that may cause crusting are not expected after planting.
Weed Control
Diagnostic testing services available:
Plant ID and herbicide resistance testing (molecular only, limited tests available) – https://turnkeygenomics.ca/sample-submission-forms/
Herbicide resistance testing (any weed, any herbicide) – https://www.plant.uoguelph.ca/sites/default/files/forages/documents/Sample%20submission%20outline%202019.pdf
Upcoming Events
Mark your calendars for the following events:
July 8 & 9, 2025 – Southwest Crop Diagnostic Days – University of Guelph, Ridgetown Campus
July 16, 2025 – Weed Day – Elora Research Station
- Weed control plot tour
- Please visit the event site to register
July 23, 2025 – Agspray Expo – Jasper, ON
- Organized by Eastern Ontario Crop Advisory Committee
- Please visit the event site for registration and more details:
July 26, 2025 – Forage Expo – Paisley ON
- Organized by the Ontario Forage Council
- Please visit the event site for more details
August 7, 2025 – Compaction Day – Jackson Seed Service, Rutherford, ON
- Organized by St. Clair Region Soil and Crop Improvement Association
- Please visit the event site for more details:
Breakfast Meeting Notes
Ridgetown Ag Breakfast notes – May 27, 2025
Planting progress
- Corn: 70-99% depending on area
- Soybean: 65-85% overall
Corn
- Planting progress: 70-99% planted, depending on area
- Clay soils remain wet with limited acres planted so far
- Much corn is emerged, earliest is in 4 to 5 leaf stage
- Corn all around is very yellow looking
- Due to cold stress, not nitrogen or sulphur deficiency
- CHU slightly behind normal, and almost 200 CHU behind last year
- With corn under stress, there is greater potential for injury, but if there is high weed pressure, it may be critical to spray now
- Most group 27 products are pretty safe, especially with warmer temperatures now and in the forecast
- Nearing time to switch hybrid maturity in Ridgetown area
- If planting now though, not enough difference to warrant a change
- Sidedressing has begun on the earliest planted crop, but most likely to be at least a week away
- Some beginning on early planted crop
Soybeans
- Planting progress: 65-85% planted, depending on area
- Clay soils remain wet and untouched
- Some replants have occurred on heavier soils due to poor emergence
- No need to switch to earlier varieties at this point
Wheat
- Wheat is heading in south, may be flowering by weekend
- Overall, crop looks excellent, although there are some small areas with minor challenges
- Fusarium risk has been low, but warmer temperatures in forecast could increase risk
- Nighttime temperatures below 9C mean low risk, as disease doesn’t develop well below this temperature
- Above 9C at night increases the risk of fusarium development, especially with increased moisture and rainfall
- Crop staging for T3 fungicide is ideal between GS 61-69
- Too early (GS 59) or too late (GS 71) reduce the chance of suppression of fusarium
- A 6-day window of fungicides may only last 4 days in some cases
- Late applications may help prevent symptoms, but kernel may already be infected with DON
- Stripe rust – spreading in fields north of London where earlier infection was seen
- Fairly uniform, but low-level infection so far
- Fields without T1 fungicide are seeing infection spread rapidly
- If your field is infected, but you are still 10 days away from T3 fungicide, advice is to spray now. Stripe rust can progress very rapidly.
- Some varieties more tolerant than others, but all are showing some infection
- Future prevention of overwintering spread may involve reduction of “green bridge” of volunteer wheat keeping spore load alive
Weeds
- 2,4-D ester, Elevore, MCPA are not recommended to add to a burndown for dry beans, due to soil activity
- 2,4-D ester shows injury when applied 7 days prior to planting and requires at least 14 days before planting dry beans. Tillage after application can increase the injury
Inputs
- UAN supply is okay
- Doesn’t appear to be a shortage overall, but some challenges due to logistics meaning delays may occur getting supply
- Some talk of growers planning to use make and use dissolved urea if they can’t get UAN when needed
- Solution is typically around 21% N, and can be challenging to make as the reaction is very endothermic (requires heat)
- Some more information here: https://fieldcropnews.com/2014/07/mitigating-leaf-burn-streamer-nozzles-and-dissolved-urea/
Agricorp
The federal and provincial governments have extended the deadline for new and existing AgriStability customers to secure 2025 coverage to July 31, 2025. Please refer to the website at www.agricorp.com for current information.
Arnprior Breakfast Meeting Minutes – May 27, 2025
Cereals
- Most winter wheat in the area is at, or approaching flag leaf (GS 37). Some further north is a little bit behind that but still looks good.
- Flag leaf is the biggest yield driver, so GS37 is a critical stage for keeping fields clean and approaching canopy.
- T3 timing will be approaching quickly.
- 2 fields in SDG are reporting powdery mildew, but there have been no other reports yet.
- Some discussion around cereal leaf beetle; no confirmed reports yet, but it may be an issue as we get closer to T3 fungicide timing.
- Spring cereals are between spike and 1 tiller stage, and look uniform and clean.
Canola
- Winter canola is still flowering. There’s some debate about the yield estimates.
- The order deadline to get winter canola seed for this fall is June 8th
- Spring canola is still being planted. Some has gone in, but other fields weren’t fit for planting yet.
Forages
- Buds are just starting in alfalfa.
- There is some early first cut started, mostly in fields with more grasses, as they have headed out.
- Fall rye harvest is winding down. Some growers are still chopping, as weather delayed harvest. Quality may be lower in those fields, but yields are good overall.
- The cool & wet weather over the last week will cause higher lignin levels in alfalfa, lowering digestibility.
- When harvesting, aim for a target moisture, not a length of time to dry it. Thick alfalfa will take longer to dry then fields with higher grass contents.
- New seeding fields look good. Staging is variable across the region depending on planting date.
- Some older stands have not come on nicely in the cooler, damp weather and are now being planted to soybeans.
- Growers are reminded that planting a traited soybean into alfalfa provides more product options and timing opportunities to terminate the alfalfa.
- It’s anticipated that there will be an increase in acres in annual forages after winter wheat harvest this summer/fall to accommodate for any unplanned termination of forage stands
Corn
- 85% planted. Any acres outstanding ran out of good weather, and are now waiting on ground to be fit again.
- The remaining 15% unplanted is still planned to go to corn, that may change by mid to late next week.
- The earliest planted corn is at 2 collar.
- In regards to herbicides on corn in cool weather, recommendations are that anything above 10 degrees Celsius, the corn is actively growing, so herbicide passes are okay.
- Growers should be making sprayer timing decisions based on forecast, how many acres they have to get over and what are the consequences of waiting (i.e. lots of acres to cover, what if rains, gets warm but doesn’t dry much and rains again)
Soybeans
- 30-50% planted in Renfrew/Cobden/Pembroke area.
- Carleton County is estimated to be 60-80% planted, with some growers approaching 100% done.
- Early emerged beans look really good.
- Growers don’t need to panic yet about planting beans – we still have 30+ days in this region to get them in the ground.
- Some pre-emerge herbicides went down, but many had to switch to planting corn, so plans have pivoted to early Post-emerge.
- There are already reports of growers confusing which traited beans are planted where (Xtend vs Enlist), so a friendly reminder to keep clear, detailed records, share information with custom spray operators and ensure the drill is well cleaned out when switching varieties.
Cobourg Ag Breakfast Meeting Notes – May 27, 2025
Heavy rains impacted the region last week. The area between Campbellford/Stirling and Kingston is very wet due to frequent rain, and planting progress has been limited in many parts of Prince Edward, Hastings, and Lennox & Addington.
Cereals
- Winter wheat is approaching or at flag leaf. Most stands are thick and look good. Some lodging has been observed. Powdery mildew is becoming an issue. Some wheat in Kawartha Lakes is struggling due to snow mould and/or waterlogged soils.
- Winter cereal forage yields were lower than expected. There may be some quality concerns due to wet, overcast conditions reducing sugar content, and mud adding ash to the forage.
Forages
- First cut dairy haylage is just starting. Yields are anticipated to be below average. Crop maturity is behind normal; early orchard grass varieties are only just starting to head out, and timothy is at flag leaf. No alfalfa weevil has been found in the region yet. Some lodging occurred following heavy rains.
Canola
- Some winter canola stands did not overwinter well, and growers are planning to terminate them. Spring canola seeding is underway as soil conditions permit.
- Corn planting progress varies widely across the region, but on average is around 70% complete. Earlier-planted fields are at 2-3 leaf stage, but the crop looks yellow. Some cold injury has been observed. Warm, sunny days will likely resolve these issues. Growers are starting to talk about switching to shorter-season hybrids.
Soybeans
- Soybean planting progress also varies but is about 50% complete across the region. Emergence has been slow due to weather and some soil crusting. Slugs could become an issue.
Mount Forest Meeting Notes – May 28, 2025
Diagnostic Testing Services
Plant ID and herbicide resistance testing (molecular only, limited tests available) – https://turnkeygenomics.ca/sample-submission-forms/
Plant ID and herbicide resistance testing (can test any weed and herbicide combination) – University of Guelph – https://www.plant.uoguelph.ca/sites/default/files/forages/documents/Sample%20submission%20outline%202019.pdf
Corn
- Most intended acres are planted.
- Generally good emergence and plant stands.
- Numerous inquiries regarding yellow corn. It will green up once warmer temperatures come.
- Concerns about spraying herbicides and potential crop injury when corn is yellow. Unless there are hybrid warnings regarding herbicide sensitivity or explicit temperature or environmental condition warnings on the herbicide label, prioritize weed removal during the critical weed-free period (V1 to V10), when weed pressure is high.
Soybeans
- Early planted soybeans (April) have emerged. While there has been frost events, it is too early to tell if they were significant enough to damage any emerged soybeans.
- Some slug and seed corn maggot damage reported.
- A considerable acreage was planted into cool conditions and many fields have not yet been planted.
Cereals
- Earliest planted wheat is in the boot stage and close to heading. It is felt that T3 fungicide timing for fusarium head blight management could occur in the next 5-7 days.
- The later planted wheat is at growth stage 37 (flag leaf).
- UAN burn is commonly seen in fields that recently had their second of two split applications.
- Scouting for stripe rust should be on everyone’s radar. If found, fungicide applications to manage stripe rust should be prioritized on fields planted to susceptible varieties and when the T3 fungicide application is not expected for another 7-10 days. If a variety is moderately resistant and a T3 fungicide will be applied within a week, then the T3 fungicide should be sufficient to manage this disease.
Forages
- Harvest of cereal rye and triticale is ongoing.
- Alfalfa first cut has begun sparingly in some areas, is expected to be more widespread in the next week or two.
Dry Beans
- A very small amount of “test” acres has been planted. More significant planting should begin sometime next week as temperatures warm up.
Weed Control
- With the recent cool temperatures, a reminder that glyphosate applications will take longer than normal to see symptoms on susceptible plants. It is not uncommon for 2-3 weeks to pass before you see meaningful results.
- More ryegrass (Lolium spp.) is being found in field crops and testing positive for glyphosate resistance. There can also be herbicide resistance to quizalofop-p-ethyl (e.g. Assure II), while sometimes being susceptible to clethodim (e.g. Select).
- Fescue species (Festuca spp.) are naturally quite tolerant to glyphosate.
- It is risky to apply “burndown” herbicides that would significantly injure or kill emerged soybeans once you get past 6 days after planting. You should access how close the hypocotyl is to the soil surface before making such applications.
Northern Ontario Meeting Notes – May 28, 2025
- Seeding is about 80% complete across northern regions. Little insect activity reported to date; black cutworm being trapped in Wisconsin and in Manitoba but according to GDD model we are a few weeks away from activity for northern Ontario. Northwest: primarily clay soils left to seed. Emergence was slow with cool conditions.
- Northeast (Temiskaming): more canola being seeded this week. Warm rain on fields that were planted last week has resulted in good emergence. Some potatoes have been planted.
- Nipissing: Most seeding done except corn. Cool May conditions, the dandelions have just started to bloom. Some producers taking first cut of orchard grass for silage this week.
- Manitoulin: Slower start due to few days above 10C and soils being wet below the surface. Spring cereals going in now, and corn and soybeans have emerged.
Christine O’Reilly, OMAFA forage and grazing specialist, shared details about sulphur fertilizer in alfalfa. Sulphur is key for protein and if the crop is deficient it cannot efficiently convert N to protein. There is no accredited test for soil S levels. The crop has a high requirement for sulphur and should be applied in an N:S ratio of 10:1. Field with regular manure likely have good S content but it may mineralize slowly in spring ahead of first cut, so application of sulphate products is recommended. Similarly, elemental S is relatively inexpensive and can be applied in the fall but may not be available to the crop in early spring ahead of first cut.
Mike Cowbrough, OMAFA weed specialist, shared some services and projects he is involved with.
Service to identify weeds or test weeds for herbicide resistance:
The services are free of charge and confidential. TurnKey genomics can conduct molecular testing using leaf samples – collect tissue from multiple plants, 5 to 10 leaves. U of Guelph can grow out seed to identify species and/or conduct herbicide screening – collect mature plants and/or mature seed from multiple plants. Contact TurnKey Genomics at chris@turnkeygenomics.ca or Dr. Francois Tardif at University of Guelph at ftardif@uoguelph.ca.
Weed control projects:
- Exploring how to control giant hogweed in a ravine pasture on a farm. It’s a tough terrain for equipment, and seed spreads readily by floating on water and moving along the river. Have been successfully grazing hogweed in a 5 acres area with goats and sheep. Hogweed grows 1 foot per week, and it can quickly become unsafe for humans to navigate the area and manage the weeds, so animals are brought in to knock it back.
- Weed management strategies in a corn, soybean and wheat rotation with and without glyphosate. Cowbrough along with Francois Tardif (UG), Rob Nurse and Eric Page (AAFC) aim to identify if there are alternatives to glyphosate and determine the efficacy and limitations to these alternatives, and how growers might adjust their practices if restrictions are imposed on glyphosate use.
- Evaluation of pre-plant herbicides to control Canada fleabane in dry beans, working with Dr. Isabelle Aicklen at University of Guelph – Ridgetown Campus.
OMAFA Weather Summary: Thurs May 22—Wed May 29, 2025
| Location | Highest Temp (°C) | Lowest Temp (°C) | Rain for Week (mm) | Rain Since April 1st (mm) | GDD0C April 1st | GDD5C April 1st | CHU May 1st |
| HARROW | |||||||
| 2025 | 20.6 | 5.0 | 3.5 | 191.0 | 627 | 359 | 81 |
| 2024 | 30.5 | 11.3 | 24.7 | 181.8 | 807 | 515 | 167 |
| 2023 | 25.8 | 4.5 | 0.0 | 75.9 | 644 | 365 | 113 |
| 10 YR Norm (2011-2020) | 25.4 | 10.5 | 28.2 | 181.9 | 636 | 349 | 155 |
| RIDGETOWN | |||||||
| 2025 | 20.7 | 4.5 | 6.0 | 137.5 | 581 | 316 | 69 |
| 2024 | 28.1 | 10.1 | 53.0 | 217.0 | 754 | 466 | 163 |
| 2023 | 26.6 | 1.4 | 0.0 | 126.3 | 604 | 334 | 105 |
| 10 YR Norm (2011-2020) | 25.1 | 8.0 | 24.9 | 161.0 | 584 | 301 | 145 |
| SARNIA | |||||||
| 2025 | 22.9 | 3.9 | 9.1 | 178.7 | 559 | 300 | 60 |
| 2024 | 30.5 | 11.3 | 35.1 | 169.5 | 732 | 448 | 158 |
| 2023 | 25.1 | 3.0 | 0.0 | 123.5 | 585 | 316 | 83 |
| 10 YR Norm (2011-2020) | 24.9 | 8.2 | 17.6 | 153.0 | 556 | 275 | 140 |
| LONDON | |||||||
| 2025 | 21.7 | 5.2 | 6.2 | 176.3 | 568 | 315 | 67 |
| 2024 | 26.8 | 10.8 | 46.0 | 188.7 | 744 | 453 | 156 |
| 2023 | 27.5 | 3.1 | 0.0 | 163.0 | 600 | 330 | 110 |
| 10 YR Norm (2011-2020) | 24.7 | 8.4 | 19.2 | 160.7 | 572 | 294 | 144 |
| BRANTFORD | |||||||
| 2025 | 21.8 | 4.5 | 36.6 | 202.7 | 569 | 312 | 66 |
| 2024 | 27.0 | 9.7 | 50.5 | 158.9 | 696 | 411 | 150 |
| 2023 | 27.8 | 2.6 | 0.0 | 139.3 | 584 | 313 | 105 |
| 10 YR Norm (2011-2020) | 27.1 | 6.6 | 19.3 | 166.4 | 554 | 279 | 159 |
| WELLAND | |||||||
| 2025 | 22.4 | 3.6 | 28.1 | 135.5 | 579 | 318 | 71 |
| 2024 | 27.4 | 10.7 | 52.3 | 184.5 | 736 | 447 | 155 |
| 2023 | 26.1 | 2.3 | 0.0 | 132.7 | 591 | 314 | 103 |
| 10 YR Norm (2011-2020) | 24.7 | 8.8 | 18.1 | 173.4 | 577 | 297 | 144 |
| GODERICH | |||||||
| 2025 | 22.9 | 2.5 | 10.8 | 119.8 | 508 | 258 | 50 |
| 2024 | 26.1 | 7.6 | 25.7 | 159.3 | 647 | 369 | 131 |
| 2023 | 23.4 | 1.9 | 0.0 | 108.4 | 522 | 269 | 89 |
| 10 YR Norm (2011-2020) | 23.0 | 6.9 | 10.3 | 139.3 | 495 | 225 | 127 |
| ELORA | |||||||
| 2025 | 20.3 | 3.0 | 22.8 | 178.9 | 506 | 260 | 53 |
| 2024 | 27.0 | 7.9 | 35.2 | 170.7 | 631 | 355 | 142 |
| 2023 | 26.9 | 1.8 | 0.0 | 118.4 | 522 | 268 | 94 |
| 10 YR Norm (2011-2020) | 23.7 | 7.6 | 14.6 | 162.9 | 490 | 224 | 134 |
| MOUNT FOREST | |||||||
| 2025 | 21.5 | 2.3 | 18.9 | 153.7 | 502 | 258 | 52 |
| 2024 | 26.3 | 7.8 | 57.3 | 210.8 | 622 | 349 | 136 |
| 2023 | 26.3 | -0.2 | 0.0 | 145.4 | 518 | 269 | 99 |
| 10 YR Norm (2011-2020) | 23.2 | 7.9 | 17.8 | 149.4 | 477 | 220 | 132 |
| BARRIE | |||||||
| 2025 | 22.6 | 5.2 | 46.8 | 167.5 | 488 | 246 | 67 |
| 2024 | 27.8 | 8.0 | 58.9 | 280.0 | 593 | 320 | 133 |
| 2023 | 25.4 | 0.7 | 1.9 | 148.4 | 504 | 249 | 87 |
| 10 YR Norm (2011-2020) | 23.5 | 6.4 | 18.8 | 147.4 | 464 | 210 | 130 |
| PETERBOROUGH | |||||||
| 2025 | 23.4 | 4.1 | 44.2 | 179.4 | 525 | 274 | 71 |
| 2024 | 29.0 | 5.8 | 12.7 | 182.9 | 622 | 344 | 132 |
| 2023 | 26.9 | 0.7 | 5.4 | 141.1 | 539 | 273 | 91 |
| 10 YR Norm (2011-2020) | 24.5 | 6.8 | 15.9 | 146.8 | 506 | 240 | 136 |
| KEMPTVILLE | |||||||
| 2025 | 26.8 | 6.1 | 12.3 | 130.7 | 549 | 295 | 81 |
| 2024 | 30.5 | 5.3 | 28.5 | 204.1 | 654 | 376 | 145 |
| 2023 | 30.3 | 1.2 | 9.3 | 202.3 | 570 | 308 | 95 |
| 10 YR Norm (2011-2020) | 24.0 | 8.2 | 15.2 | 155.1 | 529 | 265 | 139 |
| SUDBURY | |||||||
| 2025 | 25.9 | 5.5 | 24.0 | 127.1 | 400 | 191 | 79 |
| 2024 | 27.0 | 5.6 | 22.7 | 243.9 | 510 | 262 | 106 |
| 2023 | 29.0 | -0.9 | 4.1 | 198.0 | 419 | 206 | 90 |
| 10 YR Norm (2011-2020) | 23.2 | 6.9 | 15.3 | 147.8 | 381 | 176 | 132 |
| EARLTON | |||||||
| 2025 | 26.3 | 3.3 | 12.1 | 101.5 | 359 | 167 | 80 |
| 2024 | 29.2 | 1.1 | 32.1 | 196.6 | 494 | 252 | 97 |
| 2023 | 29.6 | -1.6 | 10.3 | 159.7 | 414 | 200 | 97 |
| 10 YR Norm (2011-2020) | 22.0 | 5.0 | 18.2 | 122.8 | 333 | 151 | 110 |
| SAULT STE MARIE | |||||||
| 2025 | 25.1 | 4.7 | 2.6 | 142.9 | 386 | 169 | 48 |
| 2024 | 22.8 | 3.2 | 17.6 | 203.7 | 483 | 220 | 92 |
| 2023 | 27.7 | -1.2 | 0.1 | 127.7 | 418 | 203 | 93 |
| 10 YR Norm (2011-2020) | 22.0 | 2.8 | 20.1 | 147.1 | 329 | 125 | 99 |
| THUNDER BAY | |||||||
| 2025 | 25.0 | 1.0 | 0.8 | 121.0 | 313 | 125 | 71 |
| 2024 | 22.9 | 2.7 | 13.4 | 144.1 | 399 | 160 | 71 |
| 2023 | 27.1 | -3.8 | 3.5 | 124.8 | 336 | 144 | 81 |
| 10 YR Norm (2011-2020) | 19.3 | 3.5 | 30.3 | 126.0 | 300 | 107 | 85 |
| FORT FRANCES | |||||||
| 2025 | 23.8 | -2.0 | 0.0 | 88.4 | 449 | 226 | 91 |
| 2024 | 20.3 | -0.7 | 25.3 | 147.7 | 418 | 168 | 58 |
| 2023 | 28.7 | 3.9 | 3.4 | 100.0 | 444 | 245 | 119 |
| 10 YR Norm (2011-2020) | 21.6 | 6.5 | 19.1 | 106.5 | 360 | 148 | 110 |
This weather summary is compiled by OMAFA using Environment Canada weather station data provided by Agriculture and Agri-Food Canada. Data quality is verified but accuracy is not guaranteed and should be used for general information purposes only. For additional locations and weather analysis, visit the OMAFA Pest and Weather System (PAWS)