Alberta weather in September 2025

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

  • 17°C maximum daytime temperature in September in Alberta (Calgary)17
    17°C max day temperature
  • 7 hours of sunshine per day
  • 8 days with some rainfall in September in Alberta (Calgary)8
    8 days with some rainfall
  • 4°C minimum night-time temperature in September in Alberta (Calgary)4
    4°C min night temperature
  • 13 hours of daylight per day in September in Alberta (Calgary)13
    13 hours of daylight per day
  • No heat & humidity in September in Alberta (Calgary)0
    No heat & humidity
  • 44 mm monthly rainfall in September in Alberta (Calgary)44
    44 mm of monthly rainfall
  • UV (maximum) index 4 (Moderate) in September in Alberta (Calgary)4
    4 (Moderate) UV index

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Recommended for Alberta

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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.

Top Alberta destinations

Below are average maximum temperatures at popular countries, regions and places in Alberta in September. Select a holiday destination to see more weather parameters.

All Alberta destinations

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

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More about Canada

How warm is it in Alberta in September?

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

How sunny is it in Alberta in September?

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

Does it rain in Alberta in September?

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

Alberta September sunrise & sunset times

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

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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