Last Frost Date Winnipeg: Frost Dates, Late Frost Risk & Growing Season

When is the last spring frost and the first autumn frost in Winnipeg? Frost dates from 30 years of data, the risk of late frost, frost-free days and planting dates.

The frost season in Winnipeg

Last frost (average): May 12
In 1 year out of 10 it still freezes on May 19.
First frost: October 2
Frost-free season: 146 days
Frost after 15 May: in 27 % of years

Frost days per month in Winnipeg

January: 31 · -23 °C
February: 28.2 · -20 °C
March: 29.2 · -10 °C
April: 18.5 · -1 °C
May: 3.8 · 6 °C
June: 0 · 12 °C
July: 0 · 15 °C
August: 0 · 14 °C
September: 0.7 · 8 °C
October: 13.9 · 1 °C
November: 27.9 · -9 °C
December: 31 · -18 °C

No weather station nearby: plain grid values, which are often a little too cold – dates may therefore be late.
Daily minimum temperatures 2 m above ground over 30 years (1991–2020), NASA POWER; station data: Deutscher Wetterdienst (CC BY 4.0). Ground frost can form while the air at 2 m is still +2 to +3 °C.