Calgary weather in September 2025

Expect 17°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Calgary in September. Check more long-term weather averages for Calgary in September before you book your next holiday to Alberta in 2025/2026.

  • 17°C maximum daytime temperature in September in Calgary17
    17°C max day temperature
  • 7 hours of sunshine per day
  • 8 days with some rainfall in September in Calgary8
    8 days with some rainfall
  • 4°C minimum night-time temperature in September in Calgary4
    4°C min night temperature
  • 13 hours of daylight per day in September in Calgary13
    13 hours of daylight per day
  • No heat & humidity in September in Calgary0
    No heat & humidity
  • 44 mm monthly rainfall in September in Calgary44
    44 mm of monthly rainfall
  • UV (maximum) index 4 (Moderate) in September in Calgary4
    4 (Moderate) UV index

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The September weather guide for Alberta (Calgary) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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How warm is it in Calgary in September?

Daytime temperatures usually reach 17°C in Calgary in September, falling to 4°C at night.

How sunny is it in Calgary in September?

There are normally 7 hours of bright sunshine each day in Calgary in September - that's 52% of daylight hours.

Does it rain in Calgary in September?

There are usually 8 days with some rain in Calgary in September and the average monthly rainfall is 44mm.

Calgary September sunrise & sunset times

Browse the sunrise and sunset times for Calgary in September 2025. Select a month to view Calgary sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:50 19:21
Monday, 15th September 2025 06:12 18:49
Tuesday, 30th September 2025 06:36 18:15

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