Winnipeg weather by month
Winnipeg runs from about -10°C in January to 21°C in July, with May the wettest month at 126 mm.
warmest month
July
21°C
coolest month
January
-10°C
wettest month
May
126 mm
worst air month
July
20 µg/m³
The whole year, month by month.
| Month | Avg temp | Rain | Sun | PM2.5 |
|---|---|---|---|---|
| January | -10°C | 20 mm | 132 h | 6 |
| February | -5°C | 17 mm | 156 h | 8 |
| March | -5°C | 24 mm | 245 h | 9 |
| April | 6°C | 35 mm | 285 h | 8 |
| May | 12°C | 126 mm | 299 h | 7 |
| June | 17°C | 115 mm | 351 h | 5 |
| July | 21°C | 94 mm | 412 h | 20 |
| August | 20°C | 111 mm | 350 h | 11 |
| September | 19°C | 58 mm | 310 h | 6 |
| October | 9°C | 18 mm | 251 h | 4 |
| November | 0°C | 75 mm | 109 h | 4 |
| December | -9°C | 29 mm | 95 h | 6 |
About 2,995 hours of sun a year. Roughly 74 rainy days a year.
These are long-run climate normals, not a forecast. A given year can sit well outside them. PM2.5 is a global model: near the coast it counts sea salt as fine particulate and reads high against ground stations, sometimes by a factor of two. Use the shape of the year, not the absolute number.
where these numbers come from
- · Temperature, rainfall and sunshine: ECMWF ERA5 reanalysis climate normals via Open-Meteo (CC BY 4.0), fetched once and stored.
- · PM2.5: Copernicus CAMS reanalysis, monthly means. Modelled, not station readings; near coasts CAMS counts sea salt as PM2.5 and reads high.
Last reviewed 2026-05-24. Full method, licences and the list of sources we rejected are on the methodology page.