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. 

• Current Weather Conditions - Interactive Map
• Current Conditions by Station
• Current Conditions Summary - Central, Eastern & Interlake
• Current Conditions Summary - Northwest & Southwest
• Hourly Summary
• Daily Summary
• Seasonal Summary
• Current Soil Temperature

 

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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 (August 17-23, 2026) (PDF 1.5 MB)

The past seven days were drier than previous weeks this growing season.  While scattered rain reached parts of the province, the majority saw accumulations less than 5 mm.  The Northwest, Eastern, and parts of the Interlake saw larger accumulations near the end of the week.  The largest accumulation occurred in the Minitonas with 30 mm.

Table 1. Range of measurements of seven-day accumulated precipitation in Manitoba’s Agricultural Regions (August 17-23, 2026)

Percent Normal Precipitation (PDF 1.5 MB)

Total Accumulated Precipitation (PDF 2.0 MB)

Climate normals for total accumulated precipitation from May 1 to August 23 range from 211 mm to 328 mm (Table 2) and are based on 30-year historical data. Since May 1, areas of the Northwest, Southwest and Interlake regions have accumulated 300 mm of precipitation. Seasonal accumulations are above normal for the majority of the Northwest and Southwest regions.  The southern Interlake in the Stonewall, Teulon, Petersfield, and Woodlands areas have seen accumulations over 120% of normal.  A few localized areas of the Interlake, Central, and Eastern regions have seen accumulations below 80% of the 30-year average.

Table 2. Summary of measurement of total accumulated precipitation in Manitoba’s Agricultural Regions. (May 1 to August 23, 2026)

Region	Range of Normals (mm)	Stations Above Normal (%)	Wettest Location this Season (mm, % norm.)	Driest Location this Season (mm, % norm.)
Central	231.3 → 316.8	26	Elie (308, 114)	Gretna (175, 66)
Eastern	249.3 → 328.1	17	Stead (345, 139)	Menisino (161, 49)
Interlake	212.9 → 302.4	59	Stonewall (303, 175)	Fisher Branch (168, 69)
Northwest	233 → 295.0	92	San Clara (520, 188)	The Pas (190, 79)
Southwest	210.8 → 278.5	88	Souris (397,143)	Killarney (185, 70)

 

Soil Moisture

Soil Moisture 30cm (1.5 MB)

Soil Moisture 0 - 30 cm shows a regional representation of soil moisture conditions for the top 30 cm on August 23, 2026 relative to field capacity. The majority of agro-Manitoba is showing optimal conditions.  Conditions in the Southwest and parts of the Northwest are wet.  Parts of the Interlake, Central, and Eastern regions are showing dry or very dry conditions at the 0-30 cm depths. 

Soil Moisture 120 cm (1.5 MB)

Soil Moisture 0 - 120 cm shows a regional representation of soil moisture conditions for the top 120 cm on August 23, 2026 relative to field capacity. The majority of agricultural regions are optimal or wet conditions at the 0-120 cm depths.  Pockets of the Interlake and Eastern region are showing dry conditions.

  

Growing Degree Days

Total Accumulated Growing Degree Days (PDF 2.0 MB)

Total Accumulation of Growing Degree Days shows the accumulated growing degree days (GDD) for the period of May 1 – August 23, 2026. GDD accumulations ranged between 1104 and 1533 GDD so far this growing season. Most of southern Manitoba has accumulated more than 1300 GDD.

 

Percent Normal Accumulated Growing Degree Days  (PDF 2.0 MB)

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 – August 23, 2026. The majority of agro-Manitoba has accumulated more than 105% of the normal accumultions for this time of year.

 

Table 3. Summary of total accumulated growing degree days (GDD) and percent deviation from normal in Manitoba's Agricultural Regions (May 1- August 23, 2026)

Region	Range of Normals (mm)	Stations Above Normal (%)	Highest GDD accumulation this season (GDD, % norm.)	Lowest GDD accumulation this season (GDD, % norm.)
Central	1208→ 1386	100	Winkler (1534, 113)	Somerset (1318, 107)
Eastern	1240 → 1363	95	Steinbach (1441, 111)	Sprague Lake (1204, 96)
Interlake	1194 → 1365	100	Stonewall (1411, 103)	Fisherton (1276, 107)
Northwest	1048 → 1283	100	Ste. Rose (1350, 108)	Ruthenia (1151, 102)
Southwest	999 → 1342	100	Dand (1411, 108)	Wasagaming (1103, 110)

Corn Heat Units

Total Accumulated Corn Heat Units (PDF 2.0 MB)

Total Accumulated Corn Heat Units illustrates the total accumulated Corn Heat Units (CHU) for the growing season to from May 1 – August 23.  More than 2100 CHU have accumulated in much of the Southwest, Central, Interlake and Eastern regions since May 1.

 

Percent Normal Accumulated Corn Heat Units (PDF 2.0 MB)

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 – August 23. Above average CHU accumulations were observed throughout the province.  Parts of the Northwest, Southwest, and Central regions saw accumulations above 110% of the 30-year normals.

 

Table 4. Summary of total accumulated corn heat units (CHU) and percent deviation from normal in Manitoba's Agricultural Regions (May 1 - August 23, 2026)

Region	Range of Normals (mm)	Stations Above Normal (%)	Highest CHU accumulation this season (CHU, % norm.)	Lowest CHU accumulation this season (CHU, % norm.)
Central	1961→ 2230	100	Winkler (2415, 111)	Somerset (2175, 109)
Eastern	2008 → 2193	95	Steinbach (2333, 112)	Sprague Lake (1973,97)
Interlake	1925 → 2185	100	Stonewall (2307, 106)	Fisher Branch (2082,107)
Northwest	1712 → 2101	100	Ste. Rose (2223, 111)	Ruthenia (1933, 105)
Southwest	1624→ 2134	100	Dand (2305, 110)	Wasagaming (1868, 115)

P-Days

Total Accumulated P-Days  (June 1- August 23, 2026) 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.  Most of the Central region has accumulated more than 650 P-Days so far this season.

Percent of Normal Accumulated P-Days (June 1 - August 23, 2026) represents the variation of accumulated physiological days for potatoes (P-Days) from the historical record over a 30-year period. With the exception of the East, most of agro-Manitoba P-Day accumulations are over 100% of normal so far this season.

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