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. 


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 476 KB) from May 01 to 12, 2019 shows that the southwest region did not receive any precipitation throughout last week. Areas close to the Red River south of Winnipeg got the most amount of rainfall: Brunkild (11.5 mm), Steinbach (11.4 mm), Altona (11.4 mm), Gretna (10.7 mm) and Dominion City (10.3 mm) were the areas that received > 10 mm of precipitation last week.
  • Total Accumulated Precipitation Map (PDF 475 KB) from  May 01 - 12, 2019 shows the influence of last week’s precipitation along the Red River with those areas having higher total accumulated precipitation of 12 -22mm. The entire southwest region has less than 3 mm and the Interlake region is mostly between 3  - 9 mm. The long-term average precipitation for the first two-weeks in May at most locations in agro-Manitoba ranges between 20 - 30 mm.
  • Percent of Normal Accumulated Precipitation Map (PDF 473 KB) from May 01 - 12, 2019  is based on historical record over a 30-year period. The southwest region has accumulated less than 20% of the long term average. The Pas (141%) and Dominion City (137%) are the only two locations with above normal precipitation accumulation in the first two weeks of May.
  •  Soil Moisture 30cm Map (PDF 466) for May 13, 2019 shows that the majority of agro-Manitoba has adequate soil moisture in the top 0-30 cm in relation to the soil saturation level (maximum recorded at that station). Few locations with dry surface condition corresponds with areas with coarse textured soil such as Menisino, Shilo and Pierson.
  • Total Accumulated Growing Degree Day Map - Base 5°C (PDF 485) from May 01 to 12, 2019 shows that the southern areas of the central and Eastern regions of the province received the greatest growing degree days (30 – 34 GDD). The cumulative GDD for similar period in 2018 was about 80 units so this year has had a very cool start. Growing degree days are calculated by averaging daily maximum-minimum temperatures and subtracting 5°C which assumes that growth does not occur below this temperature.
  • Percent of Normal Accumulated Growing Degree Day Map (PDF 486) from May 01 to 12, 2019 shows the range in growing degree days for agro-Manitoba.  The climate normal is based on historical record over a 30-year period. The map shows that agro-Manitoba is generally cooler than normal at all locations. The Northwest region is mostly between 14 - 30% of normal heat accumulation.
  • Total Accumulated Corn Heat Unit Map (PDF 492) from May 01 to 12, 2019 shows that the south central and south west portions of the province received the greatest accumulated corn heat units. Heat accumulation generally decreases from south to north. Corn heats units are similar to growing degree days given they both assume that growth increases with increasing temperature but they are calculated differently.  Corn heat units calculates the day and night temperatures separately.  It is assumed that no growth occurs with night temperatures below 4.4°C or day temperatures below 10°C . Maximum growth occurs at 30°C and decreases with higher temperatures.
  • Percent of Normal Accumulated Corn Heat Unit Map (PDF 480) from May 01 to 12, 2019 shows below normal CHU accumulation at all agro-MB regions, especially, in the Northwest region as well as Boissevain, Mountainside, Newdale and Minnedosa (southwest); Manitou, Snowflake and Windygates (Central); Zhoda and Menisino (Eastern).  The climate normal is based on historical record over a 30-year period.

Seasonal Maps

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.