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 varied across agro-Manitoba this week with values ranging from 0 mm to 33.8 mm (Table 1). The highest amounts of precipitation in the past seven days was in the Eastern and Central regions. Gretna (33.8 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
Gretna (33.8 mm)
Lakeland (0.6 mm)
Eastern
Dominion City (28.8 mm)
Stead (5.8 mm)
Interlake
Stonewall (11.9 mm)
Moosehorn (0.4 mm)
Northwest
McCreary (9.9 mm)
Several (0 mm)
Southwest
Waskada (23.8 mm)
St. Lazare (0 mm)
    

Percent Normal Precipitation (PDF 2 MB)

Total Accumulated Precipitation (PDF 2 MB)

Climate normals for total accumulated precipitation from May 01 - September 24, 2023 range from 269.8 mm to 387.7 mm (Table 2), and are based on 30-year historical data. Total accumulated rainfall remains variable across agro-Manitoba. Areas of the province near Fisherton have received more than 100% of normal precipitation since May 1. Much of the Central region's accumulated precipitation remains below 60% compared to the 30-year average.   

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
301.4 → 344.6
0
Emerson (232, 67%)
Cartwright (115, 34%)
Eastern
309.0 → 387.7
0
Zhoda (320, 84%)
Stead (171, 51%)
Interlake
313.1 → 348.2
1
Fisherton (321, 102%)
Arborg (180, 57%)
Northwest
269.8 → 345.7
0
Ethelbert (264, 80%)
Alonsa (154, 51%)
Southwest
270.0 → 332.9
0
Deloraine (251, 85%)
Findlay (136, 47%)

 

Soil Moisture

1) Soil Moisture 0 -30 cm (PDF 620 KB) shows a regional representation of soil moisture conditions for the top 30 cm on September 24, 2023 relative to field capacity. Soil moisture levels are variable throughout agro-Manitoba with the majority of the province showing dry to very dry conditions to the 30 cm depth. Localized areas are showing optimal to wet conditions relative to field capacity.

2) Soil Moisture 0 - 120 cm (PDF 617 KB) shows a regional representation of soil moisture conditions for the top 120 cm on September 24, 2023 relative to field capacity. The majority of the province is showing optimal to dry conditions to the 120 cm depth. Some areas of the Southwest and a few localized regions are showing wet conditions. 

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 - September 24, 2023. Much of agro-Manitoba, except in the Northwest region, has accumulated more than 1700 GDD. A large portion of Central region has accumulated more than 1850 GDD.

2) Percent Normal Accumulated Growing Degree Days (PDF 2 MB) for May 1 - September 24, 2023,  represents the variation of accumulated Growing Degree Days (GDD) from the historical record over a 30-year period. All locations, have accumulated more than 100% of the 30-year average since May 1. The majority of agro-Manitoba has accumulated more than 110% 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
1558 → 1741
25 (all)
Morden (2040, 117%)
Snowflake (1769, 102%)
Eastern
1485 → 1734
19 (all)
Winnipeg (1893, 116%)
Sprague Lake (1581, 104%)
Interlake
1439 → 1661
12 (all)
Woodlands (1872, 116%)
Fisherton (1692, 115%)
Northwest
1320 → 1578
21 (all)
McCreary (1769, 115%)
Ruthenia (1544, 108%)
Southwest
1345 → 1646
35 (all)
Boissevain (1866, 113%)
Wasagaming (1491, 108%)

 

Corn Heat Units

1) Total Accumulated Corn Heat Units (PDF 2 MB) illustrates the total accumulated Corn Heat Units (CHU) for the growing season to date. More than 2800 CHU have accumulated in the Southwest, Interlake, Central and Eastern regions since May 1.   

2) Percent Normal Accumulated Corn Heat Units (PDF 2 MB) for May 1 - August 24 , 2023 represents the variation of accumulated corn heat units (CHU) from the historical record over a 30-year period. The majority of agro-Manitoba has accumulated more than 110% 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
 2503 → 2778
25 (all)
Morden (3208, 115%)
Snowflake (2840, 102%)
Eastern
2455 → 2768
19 (all)
Winnipeg (3042, 115%)
Sprague Lake (2631, 106%)
Interlake
2386 → 2689
12 (all)
Selkirk (3017, 112%)
Fisherton (2802, 116%)
Northwest
2185 → 2620
21 (all)
McCreary (2898, 116%)
Ruthenia (2565, 110%)
Southwest
2236 → 2624
34 (all)
Boissevain (3012, 115%)
Wasagaming (2490, 109%)

 

Potato Days

1) Total Accumulated P-Days (PDF 2 MB) for June 1 - September 24, 2023 represents the total accumulated physiological days for potatoes (P-Days) since June 1. P-Days accumulation has a different start date (June 1) because accumulation commences at about 50% potato emergence. Other heat accumulation starts from May 1. The majority of agro-Manitoba has accumulated more than 840 P-Days.

2) Percent of Normal Accumulated P-Days (2 MB) for June 1 - September 24, 2023 represents the variation of accumulated physiological days for potatoes (P-Days) from the historical record over a 30-year period. All of agro-Manitoba has accumulated 95% of normal P-Days. 

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.