Fort St. John weather in September 2025

Expect daytime maximum temperatures of 15°C in Fort St. John, British Columbia in September based on long-term weather averages. There are 6 hours of sunshine per day on average with 10 days with some rainfall and typically 44 mm of rainfall in the month.

  • 15°C maximum daytime temperature in September in Fort St. John15
    15°C max day temperature
  • 6 hours of sunshine per day
  • 10 days with some rainfall in September in Fort St. John10
    10 days with some rainfall
  • 3°C minimum night-time temperature in September in Fort St. John3
    3°C min night temperature
  • 13 hours of daylight per day in September in Fort St. John13
    13 hours of daylight per day
  • No heat & humidity in September in Fort St. John0
    No heat & humidity
  • 44 mm monthly rainfall in September in Fort St. John44
    44 mm of monthly rainfall
  • UV (maximum) index 3 (Moderate) in September in Fort St. John3
    3 (Moderate) UV index

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The September weather guide for British Columbia (Fort St. John) 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 Fort St. John in September?

Daytime temperatures usually reach 15°C in Fort St. John in September, falling to 3°C at night.

How sunny is it in Fort St. John in September?

There are normally 6 hours of bright sunshine each day in Fort St. John in September - that's 43% of daylight hours.

Does it rain in Fort St. John in September?

There are usually 10 days with some rain in Fort St. John in September and the average monthly rainfall is 44mm.

Fort St. John September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:08 19:57
Monday, 15th September 2025 06:36 19:20
Tuesday, 30th September 2025 07:05 18:40

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