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.

Special Weather Report

Higher resolution maps are available upon request.

Precipitation

Eight-Day Accumulated Precipitation (PDF 2MB)

Agro-Manitoba received variable amounts of precipitation over the past eight days. Precipitation for the past eight days ranged from 0 mm to 7.6 mm (Table 1) with most regions receiving less than 1 mm. The Pas (7.6 mm) received the most precipitation.

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
 Somerset (1.0 mm)
  Several (0.0 mm)
Eastern
 Pinawa (1.9 mm)
  Several (0.0 mm)
Interlake
 Moosehorn (2.5 mm)
  Several (0.0 mm)
Northwest
 The Pas (7.6 mm)
  Several (0.0 mm)
Southwest
 Alexander (1.1 mm)
  Several (0.0 mm)
  

Percent Normal Precipitation (PDF 1 MB)

Total Accumulated Precipitation (PDF 2 MB)

Climate normals for total accumulated precipitation from May 1 to September 30 range from 279.1 mm to 397.9 mm (Table 2) and are based on 30-year historical data. Precipitation accumulation in most areas have exceeded 100% of normal precipitation since May 1. Much of the Central and Eastern regions have accumulated more than 120% compared to the 30-year average.
Table 2. Summary of measurement of total accumulated precipitation in Manitoba’s Agricultural Regions.
Region
Range of Normals (mm)
Number of Stations Above Normal
Wettest Location this Season (mm, % norm.)
Driest Location this Season (mm, % norm.)
Central
310.1 → 352.1
28
Winkler (644, 194%)
Plumas (312, 101%)
Eastern
316.9 → 397.9
15
Richer (540, 153%)
Lac Du Bonnet (270, 75%)
Interlake
321.6 → 356.0
7
Fisherton (424, 132%)
Eriksdale (262, 81%)
Northwest
279.1 → 356.0
9
Pipe Lake (467, 137%)
Swan River (222, 65%)
Southwest
279.3 → 340.1
25
Shilo (433, 138%)
Mountainside (247, 82%)
 

Soil Moisture

Soil Moisture 0-30 cm  (PDF 2 MB)

Soil Moisture 0-120 cm  (PDF 2 MB)

 

Soil Moisture 0 - 30 cm shows a regional representation of soil moisture conditions for the top 30 cm on September 30, 2024 relative to field capacity. Soil moisture is variable across agro-Manitoba with the majority showing optimal soil moisture conditions at the surface depths.

Soil Moisture 0 - 120 cm shows a regional representation of soil moisture conditions for the top 120 cm on September 30, 2024 relative to field capacity.The majority of the province is showing optimal or wet conditions at the 0 to 120 cm depth.

 

Growing Degree Days

Total Accumulated Growing Degree Days (PDF 2MB)

Percent Normal Accumulated Growing Degree Days (PDF 2 MB)

Total Accumulation of Growing Degree Days shows the accumulated growing degree days (GDD) for the period of May 1 – September 30, 2024. Much of the East, Central and Southwestern regions have accumulated more than 1700 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 30, 2024. GDD Accumulation is between 105% and 115% 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)
Number of Stations Above Normal
Highest GDD Accumulation This Season (GDD, % norm.)
Lowest GDD Accumulation This Season (GDD, % norm.)
Central
1556 → 1775
27
Winkler (1963, 111%)
Windygates (1676, 94%)
Eastern
1509 → 1766
18
Steinbach (1907, 117%)
Sprague Lake (1610, 105%)
Interlake
1462 → 1692
15 (all)
Selkirk (1861, 110%)
Narcisse (1692, 113%)
Northwest
1337 → 1606
19
Amaranth (1758, 112%)
Ruthenia (1484, 102%)
Southwest
1365 → 1676
34 (all)
Boissevain (1813, 108%)
Oakburn (1467, 100%)

 

Corn Heat Units

Total Accumulated Corn Heat Units (PDF 2 MB)

Percent Normal Accumulated Corn Heat Units (PDF 2 MB)

Total Accumulated Corn Heat Units illustrates the total accumulated Corn Heat Units (CHU) for the growing season to date. More than 2800 CHU have accumulated in the majority of the Southwest, Central, Interlake, 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. CHU accumulation is near or above normal for the season. The majority of agricultural regions in Manitoba have accumulated more than 105% of CHU when compared to normal.

 

Table 4. Summary of total accumulated corn heat units (CHU) and percent deviation from normal in Manitoba’s Agricultural Region.

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
2535 → 2837
28
Winkler (3133, 110%)
Cartwright (2761, 108%)
Eastern
2501 → 2825
19 (all)
Steinbach (3131, 118%)
Sprague Lake (2698, 106%)
Interlake
2428 → 2741
15 (all)
Selkirk (3037, 111%)
Narcisse (2770, 113%)
Northwest
2213 → 2665
19 (all)
Amaranth (2886, 113%)
Ruthenia (2484, 105%)
Southwest
2275 → 2676
34 (all)
Boissevain (2958, 111%)
Oakburn (2473, 102%)

Potato Days

Total Accumulated P-Days (PDF 2 MB)

Percent Normal Accumulated P-Days  (PDF 1 MB)

Total Accumulated P-Days (June 1 – September 30) represents the total accumulated physiological days for potatoes (P-days) since June 1.  P-days accumulation begins at about 50% potato emergence. As a result, accumulation begins on June 1. Other heat accumulation starts from May 1. The majority of agro-Manitoba has accumulated more than 900 P-Days.

Percent of Normal Accumulated P-Days (June 1 – September 30) 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 110% of normal P-Days so far this season.

 

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:
-          Current Weather Condition by Station.
-          Interactive Map of all weather stations with latest hourly weather information.
 
 

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.