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 484 KB) from to June 02, 2019  03 to 09, 2019 indicates that every part of agro-Manitoba received at least 2 mm. The southwest region received between 2 – 10 mm and the southeast region, especially, areas around Menisino (54.3 mm) and Gardenton (47.1 mm) received the highest precipitation amount throughout last week. Most areas in the Interlake region received 15 – 25 mm.
  • Total Accumulated Precipitation Map (PDF 479 KB) from May 01 - June 09, 2019 shows that the Eastern region have received the highest total precipitation accumulation between 50 and 96 mm. The lowest accumulation is around the Saskatchewan border in the southwest region with 15 – 30 mm. The northwest region and Parkland area is mostly between 15 and 40 mm of total precipitation since May 01.
  • Percent of Normal Accumulated Precipitation Map (PDF 489 KB) from May 01 - June 09, 2019 is based on historical record over a 30-year period. The Pas (128%)and some areas in the southeast corner of the province such as Menisino (103%) and Gardenton (107%) are the locations with above normal accumulated precipitation. Areas close to both the US and Saskatchewan borders in the southwest region have received 23 – 40% of normal accumulated precipitation and the Interlake region has accumulated between 50 -70%.
  •  Soil Moisture Top 30 cm Map (PDF 470 KB) & Soil Moisture Top 120 cm Map  (PDF 464 KB) for June 10, 2019 in the top 0-30 cm shows that most areas are either at optimal or dry soil moisture condition in the top 0-30 cm in relation to the soil saturation level (maximum recorded at that station). The Interlake region, southwest corner as well as some areas in the central and northwest regions of agro-Manitoba also showed dry condition in the top 30 cm. However, the 0 – 120 cm soil moisture map shows that soil moisture is mostly at optimal level across agro-Manitoba.
  • Total Accumulated Growing Degree Day Map - Base 5°C (PDF 479 KB) from May 01 to June 09, 2019 shows that the southern areas of the Central region and the southwest corner of the province, close to the Saskatchewan border received the greatest total accumulated growing degree days (270 – 298 GDD). Heat accumulation continues to improve, especially, with air temperatures greater than 30° C at most locations last week. 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 495 KB) from May 01 to June 09, 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 (maximum of 90%). Areas south of the Riding Mountain National Park as well as Pipe Lake, Rorketon and Minitonas (northwest region), Boissevain (southwest region), Manitou (central region) and Poplarfield, Narcisse and Moosehorn (Interlake region) are between 60 - 70% of normal heat accumulation.
  • Total Accumulated Corn Heat Unit Map (PDF 482 KB) from May 01 to June 09, 2019 shows that similar to the GDD, the southern areas of the Central region close to the Red River and the Southwest region close to the Saskatchewan border received the greatest total accumulated corn heat units (470 – 501 CHU). 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 498 KB) from May 01 to June 09, 2019 shows below normal CHU accumulation at all agro-MB regions, especially, in the Southeast region as well as Boissevain and Mountainside (southwest); Bagot, Treherne, Manitou, Snowflake and Windygates (Central); Dominion City, Rosa, Gardenton and Marchand (southeast); Moosehorn and Poplarfield (Interlake) and San Clara, Minitonas and Pipe Lake (northwest). These locations are between 72 – 80% of normal CHU accumulation for their area.  The highest percent normal CHU is in the Central region (Winkler, Gretna, Altona and Emerson). The climate normal is based on historical record over a 30-year period.
  • Total Accumulated Physiological Days (P-Days) (PDF 486 KB) from June 01 - 09, 2019 shows greater heat accumulation in the southwest regions of agro-Manitoba. Similar to GDD and CHU, the P-day provides an indication of heat accumulation. However, it uses 7°C as the minimum air temperature for growth and development; rapid growth at 21°C and maximum growth at 30°C. P-Day is mostly used for Potato heat accumulation. A different start date (June 01) is used for P-days because accumulation commences at about 50% potato emergence. Other heat accumulation starts from seeding.
  • Percent of Normal Accumulated P-Days (PDF 483 KB) from June 01 - 09, 2019 shows that compared to historical accumulation, some areas in the Southwest region around Russell, Minnedosa, Souris and St. Lazare have received the highest percentage of normal P-days heat accumulation 8 - 10% above normal P-day accumulation.

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.