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)
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.
Higher resolution maps are available upon request.
Precipitation
Seven-Day Accumulated Precipitation (PDF 2 MB)
Precipitation was variable across agro- Manitoba from May 22 - 28, 2023 with values ranging from 0 to 41.7 mm (Table 1). The Northwest and Southwest region received the highest amounts of precipitation over the past seven days.
Table 1. Range of measurements of seven-day accumulated precipitation in Manitoba's Agricultural Regions.
Region |
Wettest Location last Week |
Driest Location last Week |
Central |
Starbuck (19.7 mm) |
Several (0 mm) |
Eastern |
Winnipeg (11.2 mm) |
Several (0 mm) |
Interlake |
Petersfield (8.3 mm) |
Several (0 mm) |
Northwest |
The Pas (41.7 mm) |
Grandview (0 mm) |
Southwest |
Dand (35.0 mm) |
Several (0 mm) |
Percent Normal Precipitation (PDF 2 MB)
Total Accumulated Precipitation (PDF 2 MB)
Climate normals for total accumulated precipitation from May 1 - 28, 2023 range from 31.6 to 58.3 mm (Table 2), and are based on 30-year historical data. Areas of the Northwest near Drifting River, and the Southwest along the U.S. border have accumulated near normal precipitation. The majority of the central and eastern regions have received less than 60% normal precipitation.
Table 2. Summary of measurements of total accumulated precipitation in Manitoba's Agricultural Regions.
Region |
Range of Normals (mm) |
Stations Above Normal (%) |
Wettest Location this Season (mm, % norm.) |
Driest Location this Season (mm, % norm.) |
Central |
44.6 → 55.9 |
0 |
Starbuck (40, 74) |
Brunkild (8, 14) |
Eastern |
47.0 → 58.3 |
0 |
Sprague (41, 71) |
Richer (7, 13) |
Interlake |
38.9 → 50.5 |
0 |
Inwood (35, 86) |
Woodlands (8, 17) |
Northwest |
31.6 → 52.1 |
2 |
Drifting River (57, 119) |
Grandview (4, 9) |
Southwest |
38.0 → 55.9 |
3 |
Waskada (74, 171) |
Findlay (1, 2) |
Soil Moisture
1) Soil Moisture 0 -30 cm (PDF 618 KB) shows a regional representation of soil moisture conditions for the top 30 cm on May 28, 2023 relative to field capaciy. The majority of the province is showing optimal to wet conditions to the 30 cm depth.
2) Soil Moisture 0 - 120 cm (PDF 613 KB) shows a regional representationof soil moisture conditions for the top 120 cm on May 22, 2023 relative to field capacity. The majority of the province is showing wet to very wet conditions to the 120 cm depth.
Growing Degree Days
1) Total Accumulation of Growing Degree Days (PDF 2 MB) shows the accumulated growing degree days (GDD) for the period of May 1 -28, 2023. Much of agro-Manitoba has accumulated more than 250 GDD. Central and Eastern regions have accumulated the most GDD.
2) Percent Normal Accumulated Growing Degree Days (PDF 2 MB) for May 1 - 28, 2023 represents the variation of accumulated Growing Degree Days (GDD) from the historical record over a 30-year period. Much of the province has accumulated more than 120% of normal GDD.
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) |
Stations Above Normal (%) |
Highest GDD Accumulation This Season (GDD, % norm.) |
Lowest GDD Accumulation This Season (GDD, % norm.) |
Central |
168 → 221 |
31 |
Morden (311, 146) |
Lakeland (248, 148) |
Eastern |
168 → 221 |
21 |
St. Adolphe (301, 157) |
Sprague Lake (231, 133) |
Interlake |
152 → 202 |
17 |
Selkirk (287, 146) |
Taylor’s Point (233, 146) |
Northwest |
122 → 185 |
22 |
Alonsa (255, 138) |
The Pas (197, 162) |
Southwest |
146 → 207 |
43 |
Glenboro (273, 137) |
Wasagaming (201, 127) |
Corn Heat Units
1) Total Accumulated Corn Heat Units (PDF 2 MB) for May 1 - 28, 2023 illustrates the total accumulated Corn Heat Units (CHU) for the growing season to date. Recent warm temperatures led to the accumulation of > 420 CHU in the Southwest, Interlake, Central, and Eastern Regions.
2) Percent Normal Accumulated Corn Heat Units (PDF 2 MB) for May 1 - 28, 2023 represents the variation of accumulated corn heat units (CHU) from the historical record overa 30-year period. Much of agro-Manitoba has accumulated more than 120% of the historical accumulated CHU.
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) |
Stations Above Normal (%) |
Highest CHU Accumulation This Season (CHU, % norm.) |
Lowest CHU Accumulation This Season (CHU, % norm.) |
Central |
280 → 370 |
31 |
Morden (489, 137) |
Lakeland (399, 143) |
Eastern |
309 → 370 |
21 |
St. Adolphe (482, 144) |
Sprague Lake (400, 126) |
Interlake |
264 → 345 |
17 |
Selkirk (459, 138) |
Gimli (389, 147) |
Northwest |
221 → 320 |
22 |
Alonsa (421, 132) |
The Pas (342, 155) |
Southwest |
270 → 348 |
43 |
Boissevain (449, 129) |
Wasagaming (359, 128) |
Note: The information on the maps provides regional representation only. Field-specific conditions may be different from the information provided on the maps.
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)
Monthly Precipitation 2021
- Percent of Normal Precipitation - May (PDF 488 KB)
- Total Accumulated Precipitation - May (PDF 488 KB)
- Percent of Normal Precipitation - June (PDF 488 KB)
- Total Accumulated Precipitation - June (PDF 490 KB)
- Percent of Normal Precipitation - July (PDF 482 KB)
- Total Accumulated Precipitation - July (PDF 487 KB)
- Percent of Normal Precipitation - August (PDF 488 KB)
- Total Accumulated Precipitation - August (PDF 499 KB)
- Percent of Normal Precipitation - September (PDF 477 KB)
- Total Accumulated Precipitation - September (PDF 478 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.