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

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.

 

Other links of interest to access current weather conditions recorded at each station:
 
 

Seasonal Maps

First Fall Frost

Monthly Precipitation 2021

         

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.