WEATHER · CLIMATE NORMALS · 1991–2020
Winnipeg Climate — Averages by Month
What the weather in Winnipeg, CAaverages across a standard 30-year period. Each month's figure is the 1991–2020 mean temperature and total rainfall from the ERA5 reanalysis — the long-run normal a place settles around, not a forecast for any particular day.
Month-by-month normals
| Month | Avg temperature | Avg rainfall |
|---|---|---|
| January | -16.1 °C · coldest | 21.7 mm |
| February | -13.7 °C | 18.0 mm |
| March | -5.8 °C | 29.0 mm |
| April | 3.9 °C | 38.6 mm |
| May | 11.6 °C | 83.2 mm |
| June | 17.4 °C | 103.3 mm · wettest |
| July | 19.7 °C · warmest | 91.3 mm |
| August | 18.7 °C | 80.5 mm |
| September | 13.3 °C | 71.8 mm |
| October | 5.3 °C | 50.6 mm |
| November | -4.1 °C | 33.0 mm |
| December | -12.3 °C | 27.1 mm |
How to read these numbers
These are reanalysis normals, not readings from a single weather station. They come from the ERA5 0.25° (~25 km) global reanalysis grid, sampled at the grid cell nearest Winnipeg — centred at 50.00°N, 97.25°W. A reanalysis blends observations with a physics model onto an even grid, so a coastal or mountain city's cell can read a little cooler, warmer, wetter or drier than the city centre itself. The month-to-month shape — when it's hot, when it rains — is what these normals capture best.
“Normal” means the 1991–2020 average, the current World Meteorological Organization standard period. A normal is what a place tends toward over decades — any single day, month or year can and will depart from it.