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.

  • 25°C maximum daytime temperature in September in Twin Falls25
    25°C max day temperature
  • 10 hours of sunshine per day
  • 5 days with some rainfall in September in Twin Falls5
    5 days with some rainfall
  • 7°C minimum night-time temperature in September in Twin Falls7
    7°C min night temperature
  • 12 hours of daylight per day in September in Twin Falls12
    12 hours of daylight per day
  • No heat & humidity in September in Twin Falls0
    No heat & humidity
  • 15 mm monthly rainfall in September in Twin Falls15
    15 mm of monthly rainfall
  • UV (maximum) index 6 (High) in September in Twin Falls6
    6 (High) UV index

More about Twin Falls

Twin Falls by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Idaho

  • Check out latest hotel deals worldwide with Booking.com
  • Find trending hotels, popular destinations & more
  • Search for specific destinations & dates or by hotel type

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)

Back to top

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

Related posts

Popular travel offers

Explore holidays in the sun for less

More holidays

Airport parking

More parking

Airport lounges

More lounges

Top ^