Havre weather in September 2025

Expect 21°C daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in Havre in September. Check more long-term weather averages for Havre in September before you book your next holiday to Montana in 2025/2026.

  • 21°C maximum daytime temperature in September in Havre21
    21°C max day temperature
  • 9 hours of sunshine per day
  • 5 days with some rainfall in September in Havre5
    5 days with some rainfall
  • 5°C minimum night-time temperature in September in Havre5
    5°C min night temperature
  • 13 hours of daylight per day in September in Havre13
    13 hours of daylight per day
  • No heat & humidity in September in Havre0
    No heat & humidity
  • 29 mm monthly rainfall in September in Havre29
    29 mm of monthly rainfall
  • UV (maximum) index 5 (Moderate) in September in Havre5
    5 (Moderate) UV index

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The September weather guide for Montana (Havre) 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 hot is it in Havre in September?

Daytime temperatures usually reach 21°C in Havre in September, falling to 5°C at night.

How sunny is it in Havre in September?

There are normally 9 hours of bright sunshine each day in Havre in September - that's 71% of daylight hours.

Does it rain in Havre in September?

There are usually 5 days with some rain in Havre in September and the average monthly rainfall is 29mm.

Havre September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:37 19:00
Monday, 15th September 2025 05:56 18:30
Tuesday, 30th September 2025 06:17 17:59

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