Boise weather in September 2024

Expect 77°F daytime maximum temperatures in the shade with on average 10 hours of sunshine per day in Boise in September. Check more long-term weather averages for Boise in September before you book your next holiday to Idaho in 2024/2025.

  • 77°F maximum daytime temperature in September in Boise77
    77°F max day temperature
  • 10 hours of sunshine per day
  • 4 days with some rainfall in September in Boise4
    4 days with some rainfall
  • 46°F minimum night-time temperature in September in Boise46
    46°F min night temperature
  • 12 hours of daylight per day in September in Boise12
    12 hours of daylight per day
  • No heat & humidity in September in Boise0
    No heat & humidity
  • 0.7 inches monthly rainfall in September in Boise0.7
    0.7 inches of monthly rainfall
  • UV (maximum) index 6 (High) in September in Boise6
    6 (High) UV index

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The September weather guide for Idaho (Boise) 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 Boise in September?

Daytime temperatures usually reach 77°F in Boise in September with no heat and humidity, falling to 46°F at night.

How sunny is it in Boise in September?

There are normally 10 hours of bright sunshine each day in Boise in September - that's 80% of daylight hours.

Does it rain in Boise in September?

There are usually 4 days with some rain in Boise in September and the average monthly rainfall is 0.7 inches.

Boise September sunrise & sunset times

Browse the sunrise and sunset times for Boise in September 2024. Select a month to view Boise sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Sunday, 1st September 2024 07:09 20:19
Sunday, 15th September 2024 07:25 19:54
Monday, 30th September 2024 07:42 19:26

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