Monthly climate guide
Edmonton weather in September
Expect mild weather in Edmonton in September: afternoons reach about 17°C (63°F), while nights drop to around 6°C (42°F). Around 43 mm of rain falls over the month (fairly dry), and skies are often cloudy. Daytime highs are 5°C cooler than August and 9°C warmer than October.
What stands out in September
- Just 300 km apart, but Edmonton runs about 6°C warmer than Banff this month.
- It cools down fast from here: October is about 9°C cooler.
- Expect a big gap between day and night — about 12°C.
- Seasonally, September counts as early autumn in Edmonton.
Avg high
17°C
63°F
Avg low
6°C
42°F
Rainfall
43 mm
fairly dry
Humidity
72%
relative
Sky
60%
cloud · often cloudy
Edmonton weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | -6°C / 21°F | -14°C / 6°F | 24 mm | 91% | 70% |
| February | -5°C / 22°F | -15°C / 5°F | 20 mm | 88% | 67% |
| March | 1°C / 34°F | -9°C / 16°F | 27 mm | 81% | 69% |
| April | 9°C / 48°F | -2°C / 28°F | 42 mm | 70% | 68% |
| May | 17°C / 62°F | 4°C / 40°F | 65 mm | 65% | 60% |
| June | 20°C / 68°F | 9°C / 48°F | 99 mm | 70% | 64% |
| July | 23°C / 73°F | 12°C / 53°F | 110 mm | 72% | 56% |
| August | 22°C / 72°F | 11°C / 51°F | 57 mm | 70% | 58% |
| September | 17°C / 63°F | 6°C / 42°F | 43 mm | 72% | 60% |
| October | 9°C / 48°F | -1°C / 30°F | 30 mm | 78% | 69% |
| November | -1°C / 30°F | -8°C / 17°F | 34 mm | 87% | 79% |
| December | -6°C / 21°F | -13°C / 8°F | 19 mm | 90% | 70% |
What to pack for September
- A warm sweater or fleece for layering
- A mid-weight jacket
- An extra layer — evenings are noticeably cooler than afternoons
- A small travel umbrella, just in case
Is September a good time to visit Edmonton?
Compare the months in the chart above to find your ideal window.
Best time to visit Edmonton →Other Canada cities in September
Cite or embed this data
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Edmonton weather in September. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/canada/edmonton/september
<a href="https://weathercompare.eu/weather/canada/edmonton/september">Edmonton weather in September</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/canada/edmonton" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Edmonton weather in September"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/canada/edmonton/september">Edmonton weather in September</a> – WeatherCompare</p>
Edmonton in September: quick answers
Is September a good time to visit Edmonton?
Yes. September is one of the best months for Edmonton, with highs around 17°C and about 43 mm of rain.
How warm is Edmonton in September?
Average highs are about 17°C (63°F) and average lows about 6°C (42°F), based on 10 years of daily data.
Does it rain a lot in Edmonton in September?
Edmonton typically gets around 43 mm of rain in September — fairly dry.
Figures are long-term averages for the area around Edmonton (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.