Billings weather in September 2025

Expect 72°F daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in Billings in September. Check more long-term weather averages for Billings in September before you book your next holiday to Montana in 2025/2026.

  • 72°F maximum daytime temperature in September in Billings72
    72°F max day temperature
  • 9 hours of sunshine per day
  • 7 days with some rainfall in September in Billings7
    7 days with some rainfall
  • 45°F minimum night-time temperature in September in Billings45
    45°F min night temperature
  • 12 hours of daylight per day in September in Billings12
    12 hours of daylight per day
  • No heat & humidity in September in Billings0
    No heat & humidity
  • 1.5 inches monthly rainfall in September in Billings1.5
    1.5 inches of monthly rainfall
  • UV (maximum) index 6 (High) in September in Billings6
    6 (High) UV index

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The September weather guide for Montana (Billings) 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)  |  Imperial (°F)

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How hot is it in Billings in September?

Daytime temperatures usually reach 72°F in Billings in September, falling to 45°F at night.

How sunny is it in Billings in September?

There are normally 9 hours of bright sunshine each day in Billings in September - that's 68% of daylight hours.

Does it rain in Billings in September?

There are usually 7 days with some rain in Billings in September and the average monthly rainfall is 1.5 inches.

Billings September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:36 18:51
Monday, 15th September 2025 05:53 18:24
Tuesday, 30th September 2025 06:12 17:55

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