Climate averages 1991–2020
Winnipeg weather
in September.
A mild, moderately wet month: the 4th warmest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a mild month in Winnipeg: daytime highs average 18.5°C and nights cool to about 9.4°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 68 mm of rain on roughly 9 days, which makes September a moderately wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 40 min on an average September day.
The nearest other city in this atlas is Fargo (335 km away). In September its highs average 20.9°C, 2.4°C warmer than Winnipeg, with 72 mm of rain.
Among the 86 cities listed in Canada, Winnipeg ranks joint 71st of 86 for the warmest September highs and 14th of 86 for the driest September (rainfall, lowest first). The mean September high of those 86 cities is 19.8°C; Winnipeg is 1.3°C cooler than that mean.
From September to October, average highs fall by 8.9°C to 9.5°C, and monthly rainfall falls from 68 mm to 47 mm.
The annual picture
September in context
Monthly precipitation
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Winnipeg climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -12.0°C-21.0°C | -21.0°C | 16 | 4.9 | 8.69 h |
| February | -9.0°C-18.7°C | -18.7°C | 14 | 3.7 | 10.110 h |
| March | -0.9°C-10.7°C | -10.7°C | 25 | 6.2 | 11.812 h |
| April | 9.1°C-2.1°C | -2.1°C | 36 | 6.3 | 13.714 h |
| May | 16.5°C5.5°C | 5.5°C | 80 | 10.8 | 15.415 h |
| June | 22.0°C12.4°C | 12.4°C | 98 | 12.4 | 16.316 h |
| July | 24.5°C15.2°C | 15.2°C | 88 | 11.5 | 15.916 h |
| August | 24.1°C14.4°C | 14.4°C | 76 | 9.8 | 14.514 h |
| September, selected | 18.5°C9.4°C | 9.4°C | 68 | 9.1 | 12.713 h |
| October | 9.5°C2.0°C | 2.0°C | 47 | 8.1 | 10.811 h |
| November | -0.4°C-7.4°C | -7.4°C | 28 | 6.0 | 9.19 h |
| December | -8.7°C-16.4°C | -16.4°C | 22 | 5.7 | 8.28 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
September in nearby cities
- Fargo in SeptemberUnited States · 335 kmHigh 20.9°C · Low 11.4°C · 72 mm rain
- Bismarck in SeptemberUnited States · 435 kmHigh 21.4°C · Low 10.9°C · 46 mm rain
- Duluth in SeptemberUnited States · 507 kmHigh 19.5°C · Low 13.8°C · 92 mm rain
- Regina in SeptemberCanada · 536 kmHigh 18.3°C · Low 8.2°C · 40 mm rain
- Thunder Bay in SeptemberCanada · 598 kmHigh 17.8°C · Low 11.7°C · 84 mm rain
- Brooklyn Park in SeptemberUnited States · 604 kmHigh 21.6°C · Low 13.3°C · 84 mm rain
- Plymouth, United States in SeptemberUnited States · 609 kmHigh 21.5°C · Low 13.3°C · 82 mm rain
- Minneapolis in SeptemberUnited States · 618 kmHigh 21.8°C · Low 13.4°C · 84 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Winnipeg) is explained once on the Winnipeg year overview and on the Sources, method and limits page.