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. 

Special Maps

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 on request.

  • Seven-Day Accumulated Precipitation Map (PDF 801 KB)  (July 19 - July 25, 2021)   shows that precipitation across agro-Manitoba ranged from 1 mm to 57 mm at our weather station locations this week.  Eden (57 mm), Neepawa (53 mm), and Killarney (43 mm) were the top three locations with the highest precipitation. Cartwright received the lowest precipitation at 1 mm.
  • Total Accumulated Precipitation Map (PDF 796 KB) (May 01- July 25, 2021)  shows the total precipitation amount since May 1.  St. Lazare (231 mm) reported the highest total accumulated precipitation since May 1, 2021, followed by The Pas (198 mm) and Ninette (195 mm).  Most of the Interlake has accumulated less than 100 mm of precipitation since May 1. Moosehorn (60 mm) has accumulated the lowest total precipitation since May 1.
  • Percent of Normal Accumulated Precipitation (PDF 790 KB) (May 01- July 25, 2021)  is based on historical record over a 30-year period. The Pas (129%), St. Lazare (120%), and McAuley (108%) are the top three locations with the highest percent of normal precipitation.  With the exception of the Interlake and parts of the East, most of agro-Manitoba has accumulated more than 60% of normal precipitation compared to the 30-year average. Moosehorn has accumulated 33% of normal precipitation.
  • Total Accumulation of Growing Degree Days (PDF 797 KB) (May 01- July 25, 2021) shows the accumulated growing degree days (GDD) for the period of May 01 – July 25, 2021.  The maximum total GDD accumulation was observed at Winkler (1097), Gretna (1069), and Altona (1067). The southern portion of agro-Manitoba has accumulated more than 950 GDD.
  • Percent Normal Accumulated Growing Degree Days (PDF 805 KB) (May 01 - July 25, 2021)      represents the variation of accumulated Growing Degree Days (GDD) from the historical record over a 30-year period.  The majority of agro-Manitoba has accumulated more than 108% of normal GDD so far this season. Arborg (119%), Minnedosa (118%), and Inwood (115%) have accumulated the highest GDD compared to the historical average.
     
  • Total Accumulated Corn Heat Units (PDF 797 KB) (May 01 - July 25, 2021) illustrates the total accumulated Corn Heat Units (CHU) for the growing season to date. Wasagaming has accumulated the lowest total accumulated CHU with1,332.  Areas near Winkler (1,682), St. Claude (1,680), and Gretna (1,679) accumulated the most CHU since May 1.
  • Percent Normal Accumulated Corn Heat Units (PDF 807 KB) (May 01- July 25, 2021)   represents the variation of accumulated corn heat units (CHU) from the historical record over a 30-year period. Much of agro-Manitoba has accumulated more than 104% of the historical accumulated CHU. Snowflake has accumulated the lowest percent normal accumulated CHU at 96%.  Minnedosa has accumulated the highest percent normal accumulated CHU at 116% compared to the 30-year average.
  • Total Accumulated P-Days (PDF 800 KB) (June 1 - July 25, 2021)  represents the total accumulated physiological days for potatoes (P-days) since June 1, 2021.  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 410 P-days since June 1. St. Claude (436) and Minnedosa (435) accumulated the highest P-days.  Wasagaming (392 P-days) has the lowest P-Day accumulation.
  • Percent of Normal  Accumulated P-Days (PDF 794 KB) (June 01 - July 25, 2021) represents the variation of accumulated physiological days for potatoes (P-days) from the historical record over a 30-year period.  Much of agro-Manitoba has accumulated more than 100% of the normal accumulation of P-Days. Minnedosa (116%), Newdale (111%), and Forrest (110%) have the highest percent normal accumulation of P-days. Taylor’s Point (94%) and Winkler (95%) have the lowest percent normal accumulation of P-days. 
  • NEW!  Field Capacity-based Soil Moisture 0-30 cm ( PDF 658 KB) (July 25) shows a regional representation of soil moisture conditions for the top 30 cm on July 25,2021 relative to the field capacity. Very dry surface soil moisture levels are indicated n the Interlake and areas along the Red River in Central and SE regions. Areas south of Riding Mountain also showed dry to very dry conditions. Localized areas in the SW and NW showed wet conditions.
  •  NEW! Field Capacity-based Soil Moisture 0-120 cm (PDF 636 KB) (July 25) shows a regional representation of soil moisture conditions for the top 120 cm on July 25,2021 relative to the field capacity. The Interlake and locations around the Red River showed dry to very dry soil moisture conditions throughout the entire soil profile. Some areas in the SW showed wet condition which may have resulted from recent rain events in those areas. Other areas showed optimal soil moisture is at field capacity, or slightly less than field capacity.

Soil Moisture Maps Descriptions:

Saturation-based soil moisture maps takes the estimated saturation point at each location and depth as 100%. At saturation, the entire soil pore is completely field with water and this condition occurs when the water table is high or in the spring when subsoil is frozen and top soil is saturated from snowmelt. Typical saturation values for clay ranges from 50 – 60% Volumetric Water Content (VWC) but saturation for sands range from 25 – 35% VWC. Soil moisture maps were previously based on saturation, however, the use of field-capacity-based moisture determination provides an improvement over saturation-based observation.

Field Capacity-based soil moisture maps takes the estimated saturation, field-capacity and wilting points at each location and depth into account. A soil is at field-capacity when excess soil moisture from drainage has stopped and the soil is holding to the maximum amount of moisture it can hold against the force of gravity. The maps are created by defining current values that are less than 25% of available water as very dry, between 25% - 50% of available water as dry, 50% of available water to field capacity at optimal, field capacity to 75% of saturation minus field capacity, as wet and above this level, very wet. Available water is soil moisture held between field capacity and wilting point.

 
The information on the maps provides regional representation. 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

Last Spring Frost

Monthly Precipitation 2020

         

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.5