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Winnipeg Weather in September
During September, Winnipeg experiences pleasant daytime temperatures of 20°C (68°F) and cooler nights around 8°C (46°F). Expect quite a bit of rainfall. Around 75 mm (3 in) is typical.
Rainfall in Winnipeg in September
Rain is expected on roughly 10 days, totalling around 75 mm (3 in) for the month. Individual showers can be quite heavy this month. A proper umbrella or rain jacket is worth having.
Temperature in Winnipeg in September
Winnipeg has excellent weather in September, with days reaching 20°C (68°F) and nights cooling to 8°C (46°F). This creates a mild day-to-night pattern that is generally easy to manage with the right clothing. With lows around 8°C (46°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.
Sunshine in Winnipeg in September
You can expect a moderate amount of sunlight, with approximately 188 hours. This means a pleasant mix of sun and overcast.If your ideal day consists of dry skies and pleasant temperatures, July, August and September typically offer the best circumstances for Winnipeg.
Winnipeg Temperature in September
Min Temperature
8°C (46°F)
Max Temperature
20°C (68°F)
Chance of Rain
32%
Precipitation
75 mm (3 in)
Rainy days
10 days
Humidity
55%
Sunshine
188 hours
Percentage Sunshine
50%
Winnipeg Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Winnipeg - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Winnipeg typically drop from around 22°C (72°F) at the start of September to approximately 17°C (63°F) by the end. Nights are cool, with lows typically ranging from 5°C (41°F) to 12°C (54°F).
Average temperatures in September
Historical weather records for Winnipeg in September
Browse day-by-day weather records for Winnipeg spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Winnipeg historical weather extremes in September
Based on 50 years of weather observations (1976-2026), these are the most extreme conditions recorded in Winnipeg.
- The hottest September day on record in Winnipeg reached 36°C (97°F) (September 2, 2023).
- Winnipeg registered its coldest September night on September 28, 2002, with temperatures dropping to -7°C (19°F).
Best Places in Canada in September
Find out more about the weather in Canada and which places have the best travel conditions in this month. See all of Canada in September →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Winnipeg in September
Comfortable temperatures call for an easy wardrobe in September. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Wet weather is likely, so pack waterproof gear for multiple rainy days. Bring sunglasses since you'll have some sunny periods throughout the month
What To Do in Winnipeg in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming6/10 -
Cycling9/10 -
Walking9/10 -
Camping4/10 -
Outdoor sports9/10
Winnipeg 3-Day Forecast
More climate data for Winnipeg
Temperature Rainfall Sunshine Humidity
See the full Winnipeg climate overview or explore weather in Canada.
Popular in September
Where to go in September - average daytime high across popular destinations.
Toronto
22°C (72°F) Niagara Falls23°C (73°F) Montréal
22°C (72°F) Ottawa22°C (72°F) Quebec City
20°C (68°F) Vancouver19°C (66°F) Calgary19°C (66°F) Whistler15°C (59°F) Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
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