Calgary weather in September
Calgary in September averages 12°C (54°F) and 33 mm of rain.
Of the twelve months in Calgary, September is the fourth warmest and the fifth wettest.
- Average temp
- 12°C (54°F)
5–19°C · 41–66°F
- Rainfall
- 33 mm
Not much rain
- Sunshine
- —
What is Calgary like in September?
Daytime
Days are mild.
Rain
Rain is usually light.
Evening
Evenings are cooler. A layer helps after sunset.
What should I pack for Calgary in September?
A warm mid-layer
Nights drop to around 5°C (41°F).
September compared with August and October
September in Calgary is 4.2°C cooler than August and 14 mm drier than it, which averages 16°C (61°F).
September in Calgary is 6.6°C warmer than October and 13 mm wetter than it, which averages 5°C (42°F).
Daylight in Calgary in September
On 15 September the sun is up for 12 hours 36 minutes in Calgary, rising about 07:12 and setting about 19:48 local time.
September ends 1 hour 51 minutes shorter than it begins, so the last week of the month is a different length of day from the first.
That is 3 hours 56 minutes short of June, the longest-lit month here.
Where to stay in Calgary
Dates are a starting point for September.
Travel guides for Calgary
What to read before you book.
Calgary weather by month
TemperatureRainfall
How September compares with the rest of the year
September is highlighted. Every other month links to its own page.
| Month | Average | Rainfall |
|---|---|---|
| January | -6°C / 21°F | 9 mm |
| February | -6°C / 20°F | 13 mm |
| March | -2°C / 28°F | 19 mm |
| April | 4°C / 40°F | 28 mm |
| May | 10°C / 49°F | 58 mm |
| June | 14°C / 57°F | 106 mm |
| July | 18°C / 64°F | 44 mm |
| August | 16°C / 61°F | 47 mm |
| September | 12°C / 54°F | 33 mm |
| October | 5°C / 42°F | 21 mm |
| November | -2°C / 29°F | 17 mm |
| December | -6°C / 21°F | 17 mm |
Similar weather in September
Other destinations whose September averages sit close to this one.
Check another month
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FAQs about Calgary in September
September climate averages for Calgary, 1991–2020.
Calgary averages 12°C (54°F) in September, ranging from about 5°C (41°F) at night to 19°C (66°F) in the afternoon. That is a 1991–2020 average, so an individual week can run either side of it.
Barely. September sees only about 33 mm, so rain is unlikely to affect your plans.
Yes. September averages 12°C (54°F) against 5°C (42°F) in October — 6.6°C warmer.
September is 4.2°C cooler than August, and 14 mm drier.
Yes. September falls inside the most comfortable stretch of the year here, May to October, on temperature and rainfall together.
This page does not show today's weather. It is a 1991–2020 climate normal from Meteostat — a long-run average of what September is usually like, which is what you want when booking months ahead. For today or the coming week, check a live forecast.
About 12 hours 36 minutes of daylight in mid-September, against 16 hours 32 minutes in June and 7 hours 56 minutes in December.
On 15 September, sunrise is about 07:12 and sunset about 19:48 local time. Both shift across the month — the month ends 1 hour 51 minutes shorter than it starts.
