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Twin Falls weather in September 2025
Expect 25°C daytime maximum temperatures in the shade with on average 10 hours of sunshine per day in Twin Falls in September. Check more long-term weather averages for Twin Falls in September before you book your next holiday to Idaho in 2025/2026.
- 2525°C max day temperature
- 10 hours of sunshine per day
- 55 days with some rainfall
- 77°C min night temperature
- 1212 hours of daylight per day
- 0No heat & humidity
- 1515 mm of monthly rainfall
- 66 (High) UV index
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The September weather guide for Idaho (Twin Falls) 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 Twin Falls in September?
Daytime temperatures usually reach 25°C in Twin Falls in September with no heat and humidity, falling to 7°C at night.
How sunny is it in Twin Falls in September?
There are normally 10 hours of bright sunshine each day in Twin Falls in September - that's 80% of daylight hours.
Does it rain in Twin Falls in September?
There are usually 5 days with some rain in Twin Falls in September and the average monthly rainfall is 15mm.
Twin Falls September sunrise & sunset times
Browse the sunrise and sunset times for Twin Falls in September 2025. Select a month to view Twin Falls sunrise and sunset times for the next 12 months.
JanFebMarAprMayJunJulAugSepOctNovDec
Date | Sunrise times | Sunset times |
---|---|---|
Monday, 1st September 2025 | 06:03 | 19:11 |
Monday, 15th September 2025 | 06:18 | 18:47 |
Tuesday, 30th September 2025 | 06:34 | 18:20 |
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