Weather Conditions and Reports
Manitoba's ag weather program measures and records data year round from over 100 weather stations across agro-Manitoba. The stations monitor air temperature, relative humidity, barometric pressure, precipitation, wind speed and direction, solar radiation, soil temperature, and soil moisture. The latest weather conditions from each station are made available every 15 minutes throughout the growing season and every hour during the winter months.
Agro-Manitoba Weather Extremes
- Agro-Manitoba Weather Extremes of 2022 (PDF 1 MB)
- Agro-Manitoba Weather Extremes of 2021 (PDF 1 MB)
- Agro-Manitoba Weather Extremes of 2020 (PDF 1 MB)
Special Maps and Report
- Special Precipitation Map August 20-21, 2025 (1 MB)
- Sepecial Crop Weather Report Hourly Precipitation (142 KB)
Weekly Crop Weather Report and Maps
The latest weather report and maps are made available every Monday year round. Subscribe to receive a weekly distribution of seasonal reports and maps by email.
- Crop Weather Report (PDF 156 KB)
- Archived Crop Weather Reports
Higher resolution maps are available upon request.
Precipitation
Eight-Day Accumulated Precipitation (PDF 2 MB)
August 25 - September 1, 2025
Isolated rainfall and storm events occurred across the province this week, with weekly accumulations ranging from 0 mm to 60.3 mm (Table 1). Areas near Riding Mountain National Park and near the Red River Valley received more than 10 mm of rain in the past eight days. The highest amount of rainfall was observed at Kane (60.3 mm).
Table 1. Range of measurements of four-day accumulated precipitation in Manitoba's Agricultural Regions.
Region |
Wettest Location last eight days |
Driest Location last eight days |
Central |
Kane (60.3 mm) |
Several (0 mm) |
Eastern |
Dominion City (31.2 mm) |
Dugald (1.4 mm) |
Interlake |
Stonewall (5.9 mm) |
Teulon, Petersfield (0 mm) |
Northwest |
Fork River (15.7 mm) |
McCreary, Alonsa (0 mm) |
Southwest |
Newdale (30.9 mm) |
Several (0.0 mm) |
Percent Normal Precipitation (PDF 2 MB)
Percent Total Precipitation (PDF 2 MB)
Climate normals for total accumulated precipitation from May 1 to September 1 range from 221.7 mm to 342.4 mm (Table 2) and are based on 30-year historical data. The majority of the Southwest, Central, and Eastern regions have accumulated more than 180 mm this growing season. Total precipitation accumulations this season remain below 60% compared to the 30-year average in the Interlake and parts of the Northwest and Eastern regions. Parts of the Southwest have accumulated higher than normal precipitation levels since May 1.
Table 2. Summary of measurement of total accumulated precipitation in Manitoba’s Agricultural Regions.
Region |
Range of Normals (mm) |
Percent of Stations Above Normal (%) |
Wettest Location this Season (mm, % norm.) |
Driest Location this Season (mm, % norm.) |
Central |
246.4 → 342.4 |
9 |
Starbuck (323, 102%) |
Austin (147, 56%) |
Eastern |
270.0 → 340.8 |
0 |
Zhoda (266, 85%) |
Elma (161, 53%) |
Interlake |
228.3 → 324.4 |
0 |
Lake Francis (230, 92%) |
Fisher Branch (87, 32%) |
Northwest |
249.2 → 312.4 |
4 |
Ethelbert (301, 96%) |
Laurier (110, 44%) |
Southwest |
221.7 → 290.1 |
15 |
Neepawa (333, 118%) |
St. Lazare (139, 51%) |
Soil Moisture
Soil Moisture 30cm (2 MB)
Soil Moisture 120cm (2 MB)
- Soil Moisture 0 - 30 cm shows a regional representation of soil moisture conditions for the top 30 cm on September 1, 2025 relative to field capacity. Soil moisture is variable across agro-Manitoba with areas within the same regions showing very dry to wet conditions due to variable precipitation. Large areas of the Interlake continue to show dry or very dry conditions. Optimal were prevalent in the Northwest, Southwest, and Central regions on September 1 with localized areas displaying wet, dry, or very dry conditions.
- Soil Moisture 0 - 120 cm shows a regional representation of soil moisture conditions for the top 120 cm on September 1, 2025 relative to field capacity. Large portions of the Interlake are showing dry conditions. The majority of the remaining regions are showing wet or optimal conditions at the 0 to 120 cm depth with some localized areas showing dry or very dry conditions.
Growing Degree Days
Total Accumulation of Growing Degree Days (2 MB)
Percent Normal Accumulated Growing Degree Days (2 MB)
- Total Accumulation of Growing Degree Days shows the accumulated growing degree days (GDD) for the period of May 1 – September 1, 2025. Much of the Southwest, Central, and East regions have accumulated more than 1400 GDD since May 1.
- Percent Normal Accumulated Growing Degree Days represents the variation of accumulated Growing Degree Days (GDD) from the historical record over a 30-year period from May 1 – September 1, 2025. GDD Accumulations are between 100% and 110% of normal for the majority of agro-Manitoba.
Table 3. Summary of total accumulated growing degree days (GDD) and percent deviation from normal in Manitoba's Agricultural Regions.
Region |
Range of Normals (GDD) |
Percent of Stations Above Normal (%) |
Highest GDD Accumulation This Season (GDD, % norm.) |
Lowest GDD Accumulation This Season (GDD, % norm.) |
Central |
1315 → 1495 |
100 |
Winkler (1661, 112%) |
Pilot Mound (1373, 104%) |
Eastern |
1348 → 1481 |
94 |
St. Adolphe (1578, 108%) |
Sprague Lake (1321, 96%) |
Interlake |
1297 → 1484 |
94 |
Selkirk (1563, 108%) |
Fisherton (1364, 105%) |
Northwest |
1136 → 1395 |
96 |
McCreary (1471, 107%) |
San Clara (1236, 109%) |
Southwest |
1087 → 1460 |
100 |
Deloraine (1509, 108%) |
Wasagaming (1198, 110%) |
Corn Heat Units
Total Accumulation of Corn Heat Units (2 MB)
Percent Normal Accumulation Corn Heat Units (2 MB)
- Total Accumulated Corn Heat Units illustrates the total accumulated Corn Heat Units (CHU) for the growing season to from May 1 – September 1. More than 2300 CHU have accumulated in the majority of the Southwest, Interlake, Central, and Eastern regions since May 1.
- Percent Normal Accumulated Corn Heat Units represents the variation of accumulated Corn Heat Units (CHU) from the historical record over a 30-year period for the period of May 1 – September 1. CHU accumulations are between 100% and 110% of normal for most regions.
Table 4. Summary of total accumulated corn heat units (CHU) and percent deviation from normal in Manitoba's Agricultural Regions.
Region |
Range of Normals (CHU) |
Number of Stations Above Normal |
Highest CHU Accumulation This Season (CHU, % norm.) |
Lowest CHU Accumulation This Season (CHU, % norm.) |
Central |
2132 → 2394 |
100 |
Winkler (2608, 110%) |
Pilot Mound (2229, 104%) |
Eastern |
2187 → 2381 |
100 |
St. Adolphe (2534, 108%) |
Sprague Lake (2234, 101%) |
Interlake |
2092 → 2376 |
100 |
Selkirk (2516, 108%) |
Fisher Branch (2239, 106%) |
Northwest |
1856 → 2285 |
100 |
McCreary (2412, 108%) |
San Clara (2063, 111%) |
Southwest |
1766 → 2317 |
100 |
Deloraine (2454, 110%) |
Wasagaming (2027, 115%) |
P-Days
Percent Normal P-Days (2 MB)
Total Accumulated P-Days (2 MB)
- Total Accumulated P-Days (June 1 – September 1) represents the total accumulated physiological days for potatoes (P-days) since June 1. As P-Day accumulation begins at about 50% potato emergence, accumulation begins on June 1. The southern regions of agro-Manitoba have accumulated more than 700 P-Days so far this season.
- Percent of Normal Accumulated P-Days (June 1 – September 1) represents the variation of accumulated physiological days for potatoes (P-days) from the historical record over a 30-year period. The majority of agro-Manitoba has accumulated over 100% of normal P-Days so far this season.
Other links of interest to access current weather conditions recorded at each station:
- Current Weather Condition by Station.
- Interactive Map of all weather stations with latest hourly weather information.
Seasonal Maps
First Fall Frost
- 10% Risk* Date of the First Fall Frost at 0°C (PDF 579 KB)
- 25% Risk* Date of the First Fall Frost at 0°C (PDF 576 KB)
- Average* Date of the First Fall Frost at 0°C (PDF 575 KB)
Seasonal Reports
Visit the Seasonal Reports page for information on progress in seeding and crop establishment, crop development, pest activity including weeds, insects and disease, harvest progress, crop yields and grades, fall field work progress, and status of winter cereal crop seeding and establishment. Information on haying progress and estimated yields, as well as pasture conditions is included.