Manitoba weather in September
September is one of the best months to visit Manitoba: highs of 20°C (67°F) and about 60 mm (2.4 in) of rain on average. Nights average 8°C (46°F) and cloud cover 55% (NASA POWER, 2001–2025 averages). It is the 5th wettest month of the year and the 4th warmest. Compared with August, it is cooler and about as wet; October brings highs of 10°C (49°F) and 43 mm (1.7 in) of rain.
Figures are long-term averages for Winnipeg, the largest city in Manitoba. See below for other places.
Is September a good time to visit Manitoba?
best month Weather score 78/100.
Yes. September is one of the best months for weather in Manitoba.
Does it rain a lot in Manitoba in September?
Some rain is normal: about 60 mm (2.4 in) falls in an average September. It is the 5th wettest month of the year.
How warm is Manitoba in September?
Days average 20°C (67°F) and nights 8°C (46°F).
Manitoba weather by month
| Month | High | Low | Rain | Cloud | Weather |
|---|---|---|---|---|---|
| January | -12°C (10°F) | -22°C (-8°F) | 23 mm | 64% | least pleasant |
| February | -10°C (14°F) | -21°C (-6°F) | 19 mm | 56% | least pleasant |
| March | 0°C (31°F) | -11°C (12°F) | 33 mm | 61% | least pleasant |
| April | 10°C (51°F) | -1°C (30°F) | 37 mm | 61% | least pleasant |
| May | 18°C (64°F) | 6°C (43°F) | 79 mm | 60% | best |
| June | 24°C (74°F) | 13°C (55°F) | 94 mm | 60% | best |
| July | 27°C (80°F) | 15°C (60°F) | 71 mm | 50% | best |
| August | 26°C (78°F) | 14°C (57°F) | 64 mm | 52% | best |
| September | 20°C (67°F) | 8°C (46°F) | 60 mm | 55% | best |
| October | 10°C (49°F) | 0°C (33°F) | 43 mm | 66% | least pleasant |
| November | 0°C (32°F) | -8°C (17°F) | 26 mm | 70% | least pleasant |
| December | -9°C (15°F) | -18°C (0°F) | 25 mm | 68% | least pleasant |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis). Page updated . How we rate months
Weather across Manitoba in September
Weather can differ a lot within Manitoba: coasts, hills and mountains each have their own climate.
| Place | High | Low | Rain | Weather |
|---|---|---|---|---|
| Winnipeg | 20°C (67°F) | 8°C (46°F) | 60 mm | best |
| Fort Garry | 20°C (67°F) | 8°C (46°F) | 60 mm | best |
| Brandon | 20°C (67°F) | 7°C (44°F) | 49 mm | best |
| Assiniboine South | 20°C (68°F) | 8°C (46°F) | 58 mm | best |
| St. James-Assiniboia East | 20°C (68°F) | 8°C (46°F) | 58 mm | best |
| Steinbach | 20°C (68°F) | 8°C (46°F) | 59 mm | best |