Weather in Winnipeg in September 2025
Average weather
Average temperature in Winnipeg in September
Going from a maximum of +36°C during the day to a minimum of +5°C during the night, the temperature in September averages around +23°C.
The average maximum temperature goes down 13% by the end of the month, compared with the beginning of the month, from +28°C to +24°C.
Is Winnipeg warm or cold in September?
Winnipeg is typically mild in September.
Maximum temperatures go down compared to the previous month from +26°C to +20°C. The minimum temperature also goes down from +13°C to +8°C.
Pack a light jacket as it will be warm in the day and cool in the evenings.
Take a look at how September is compared to other months in Winnipeg:
Climate in Winnipeg in September
| August | September | October | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +26°C | +20°C | +11°C | ||||
| Min. temperature | ||||||
| 0°C | -6°C | -19°C | ||||
| Max. temperature | ||||||
| +37°C | +37°C | +32°C | ||||
| Rainfall | ||||||
| 83 mm | 61 mm | 41 mm | ||||
| Wind | ||||||
| 3 m/s | 4 m/s | 4 m/s | ||||
| Humidity | ||||||
| 72% | 72% | 75% | ||||
| Air pressure | ||||||
| 1012 HPa | 1013 HPa | 1014 HPa | ||||
| Sunny days | ||||||
| 6 | 5 | 3 | ||||
| Cloudy days | ||||||
| 10 | 11 | 14 | ||||
| Rainy days | ||||||
| 14 | 13 | 10 | ||||
| Snowy days | ||||||
| 0 | 0 | 3 | ||||
September weather is still as good as in August. It’s getting colder in September. From +26°C in the day, the average maximum temperature lowers to +20°C. As September arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 83 mm to 61 mm. Humidity levels don’t change as the month goes on, averaging around 72%. Winds are stronger in comparison to August, going up from 3 m/s to 4 m/s on average. The days becoming less sunny, going from 6 sunny days in August to 5 in September.
Next month (October) brings a further decline in the weather.
Wind
The average wind speed is 4 m/s getting up to 7 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Winnipeg is gradually decreasing during September, going from 6 m/s to 3 m/s over the course of the month.
Rain
How was the weather last September in Winnipeg?
Climate Change over Years
The climate in Winnipeg in September has not changed much over the last 43 years.
The average temperature was the lowest in 1996 (+6°C) and the highest in 2021 (+11°C). The driest year was 1988 with only 222 mm of rainfall, and the wettest year was 2022 with 1095 mm.
FAQ
Is September a good time to visit Winnipeg?
Can you sunbathe in Winnipeg in September?
Is Winnipeg rainy in September?
Is it sunny in Winnipeg in September?
Other cities in Canada
Monthly weather in Winnipeg
Source of the data
For this page, we’ve looked at the typical weather in Winnipeg, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.