Idaho weather in September 2022

  • 25°C maximum daytime temperature in September in Idaho (Boise)25
    25°C max day temperature
  • 10 hours of sunshine per day
  • 4 days with some rainfall in September in Idaho (Boise)4
    4 days with some rainfall
  • 8°C minimum night-time temperature in September in Idaho (Boise)8
    8°C min night temperature
  • 12 hours of daylight per day in September in Idaho (Boise)12
    12 hours of daylight per day
  • No heat & humidity in September in Idaho (Boise)0
    No heat & humidity
  • 19 mm monthly rainfall in September in Idaho (Boise)19
    19 mm of monthly rainfall
  • UV (maximum) index 6 (High) in September in Idaho (Boise)6
    6 (High) UV index

Below are average maximum temperatures at popular destinations in Idaho in September. Select a destination to see more weather parameters.

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Recommended for Idaho

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.

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

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How hot is it in Idaho in September?

Daytime temperatures usually reach 25°C in Boise, Idaho in September with no heat and humidity, falling to 8°C at night.

How sunny is it in Idaho in September?

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

Does it rain in Idaho in September?

There are usually 4 days with some rain in Boise, Idaho in September and the average monthly rainfall is 19mm.

Idaho September sunrise & sunset times

Browse the sunrise and sunset times for Idaho in September 2022. Select a month to view Idaho sunrise and sunset times for the next 12 months. The Idaho sunrise and sunset times shown below are for Boise.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st September 2022 07:09 20:20
Thursday, 15th September 2022 07:24 19:55
Friday, 30th September 2022 07:41 19:27

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