Coeur d'Alene weather in September 2026

Q: How hot is it in Coeur d'Alene in September?

Daytime temperatures usually reach 25°C in Coeur d'Alene in September with no heat and humidity, falling to 8°C at night.

Q: How sunny is it in Coeur d'Alene in September?

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

Q: Does it rain in Coeur d'Alene in September?

There are usually 4 days with some rain in Coeur d'Alene in September and the average monthly rainfall is 19mm.

Expect daytime maximum temperatures of 23°C in Coeur d'Alene, Idaho in September based on long-term weather averages. There are 9 hours of sunshine per day on average.

23
23°C max day temperature
9
9 hours of sunshine per day
7
7 days with some rainfall
6
6°C min night temperature
13
13 hours of daylight per day
0
No heat & humidity
32
32 mm of monthly rainfall
5
5 (Moderate) UV index

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The September weather guide for Idaho (Coeur d'Alene) 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)

More about the USA

How hot is it in Coeur d'Alene in September?

Daytime temperatures usually reach 25°C in Coeur d'Alene in September with no heat and humidity, falling to 8°C at night.

How sunny is it in Coeur d'Alene in September?

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

Does it rain in Coeur d'Alene in September?

There are usually 4 days with some rain in Coeur d'Alene in September and the average monthly rainfall is 19mm.

Coeur d'Alene September sunrise & sunset times

Browse the sunrise and sunset times for Coeur d'Alene in September 2026. Select a month to view Coeur d'Alene sunrise and sunset times for the next 12 months.

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