Manitoba Agriculture
Seasonal Crop Summary
August 18, 2026
Northwest Region
Unsettled weather moved in across most of the region towards weeks end bringing precipitation. Overnight temperatures cooled this week with most of the region at or below 10°C, lowest over night temperature was recorded at Inglis station at 4.1°C.
Fall rye and winter wheat harvest is underway. Pre-harvest herbicide applications are mostly complete in winter cereals. Spring wheat ranges from the soft to hard dough stage, with some later seeded fields continuing to catch up. Some lodging has occurred.
Field peas are mostly in the R6 stage, with some early seeded fields at R7.
Canola continues to be at a range of growth stages, with most crops in the podding stage. Fields that experienced excess moisture have patches of delayed growth that are still flowering. Sunscald has appeared after previous high temperatures.
The majority of the soybean crop is in the R4 stage.
Provincial Overview
A large system brought significant rains to much of the Southwest region and parts of the Interlake. Scattered rains were observed throughout the Northwest and Central regions. The largest accumulations occurred in the Southwest with Reston receiving 111 mm of rain over August 14 and 15.
Climate normals for total accumulated precipitation from May 1 to August 16 range from 202 mm to 307 mm and are based on 30-year historical
data. Since May 1, areas of the Northwest, Southwest, and Interlake regions have accumulated more than 300 mm of precipitation. Seasonal
accumulations are above normal for the majority of the Northwest and Southwest regions. The southern Interlake in the Stonewall, Petersfield,
and Woodlands areas have seen accumulations over 150% of normal. A few localized areas of the Interlake, Central and Eastern regions have seen accumulations below 80% of the 30-year average.
Total Accumulation of Growing Degree Days shows the accumulated growing degree days (GDD) for the period of May 1 – August 16, 2026.
GDD accumulations ranged between 1036 and 1442 GDD so far, this growing season. Most of southern Manitoba has accumulated more than 1250 GDD.