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 3-16, 2026) (PDF 1.5 MB)

A large system brought significant rains to much of the Southwest region and parts of the Interlake.  Scattered rains were observed through the Northwest and Central regions.  The largest accumulations occurred in the Southwest with Reson receiving 111 mm of rain over August 14 and 15th.

Table 1. Range of measurements of seven-day accumulated precipitation in Manitoba’s Agricultural Regions (August 3-16, 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 16 range from 202 mm to 307 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, Petersfield, and Woodlands areas have seen accumulations over 150% 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 16, 2026)

Region	Range of Normals (mm)	Stations Above Normal (%)	Wettest Location this Season (mm, % norm.)	Driest Location this Season (mm, % norm.)
Central	221.4 → 298.8	41	Elie (307, 120)	Gretna (175, 69)
Eastern	231.6 → 307.1	23	Pinawa (329, 121)	Menisino (161, 52)
Interlake	202.1 → 282.8	59	Stonewall (523, 185)	Fisher Branch (165, 71)
Northwest	220.7 → 280.5	96	San Clara (519, 199)	The Pas (190, 83)
Southwest	203.0 → 268.2	89	Souris (397,148)	Killarney (180, 71)

 

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 16, 2026 relative to field capacity. Rain at the end of the week brough soil moisture conditions in the Southwest to wet levels.  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 16, 2026 relative to field capacity. The majority of agricultural regions are optimal or wet conditions at the 0-120 cm depths.

  

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 16, 2026. GDD accumulations ranged between 1036 and 1442 GDD so far this growing season. Most of southern Manitoba has accumulated more than 1250 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 16, 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 16, 2026)

Region	Range of Normals (mm)	Stations Above Normal (%)	Highest GDD accumulation this season (GDD, % norm.)	Lowest GDD accumulation this season (GDD, % norm.)
Central	1121→ 1289	100	Winkler (1442, 114)	Somerset (1240, 109)
Eastern	1153 → 1269	90	Steinbach (1356, 112)	Sprague Lake (1141, 98)
Interlake	1111 → 1270	100	Stonewall (1323, 104)	Fisherton (1198, 108)
Northwest	974 → 1193	100	Ste. Rose (1266, 109)	Ruthenia (1083, 103)
Southwest	928 → 1247	100	Dand (1325, 109)	Wasagaming (1036, 112)

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 16.  More than 2000 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 16. 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 16, 2026)

Region	Range of Normals (mm)	Stations Above Normal (%)	Highest CHU accumulation this season (CHU, % norm.)	Lowest CHU accumulation this season (CHU, % norm.)
Central	1823→ 2075	100	Winkler (2269, 112)	Somerset (2043, 110)
Eastern	1869 → 2043	95	Steinbach (2190, 113)	Sprague Lake (1861,98)
Interlake	1790 → 2033	100	Stonewall (2160, 106)	Fisher Branch (1954, 108)
Northwest	1592 → 1952	100	Ste. Rose (2081, 111)	Ruthenia (1816, 106)
Southwest	1508→ 1986	100	Dand (2164, 111)	Wasagaming (1753, 116)

P-Days

Total Accumulated P-Days  (June 1- August 16, 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 600 P-Days so far this season.

Percent of Normal Accumulated P-Days (June 1 - August 16, 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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