Idaho weather in September 2020

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

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The September weather guide for Idaho 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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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 sunrise & sunset times for September 2020

Browse the sunrise & sunset times for Idaho in September 2020. Select a month to view Idaho sunrise & sunset times for the next twelve months. The Idaho sunrise & sunset times shown below are for Boise.

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