Idaho Falls weather in September 2025

Expect 23°C daytime maximum temperatures in the shade with on average 10 hours of sunshine per day in Idaho Falls in September. Check more long-term weather averages for Idaho Falls in September before you book your next holiday to Idaho in 2025/2026.

  • 23°C maximum daytime temperature in September in Idaho Falls23
    23°C max day temperature
  • 10 hours of sunshine per day
  • 6 days with some rainfall in September in Idaho Falls6
    6 days with some rainfall
  • 5°C minimum night-time temperature in September in Idaho Falls5
    5°C min night temperature
  • 12 hours of daylight per day in September in Idaho Falls12
    12 hours of daylight per day
  • No heat & humidity in September in Idaho Falls0
    No heat & humidity
  • 22 mm monthly rainfall in September in Idaho Falls22
    22 mm of monthly rainfall
  • UV (maximum) index 6 (High) in September in Idaho Falls6
    6 (High) UV index

More about Idaho Falls

Idaho Falls by month

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

Recommended for Idaho

Holiday Autos discount code: up to 10% off global car hire

  • Save up to 10% on cheap car hire worldwide
  • Exclusive Holiday Autos discount code automatically applied
  • Travel before 31st December 2024 (inclusive)
Show discount codeShow discount code ******vel
Redeem Holiday Autos discount code >>

Expires at 23:59 on Tuesday 31st Dec 2024 · View all Holiday Autos offers

Holiday AutosCar hire finder

The September weather guide for Idaho (Idaho 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 Idaho Falls in September?

Daytime temperatures usually reach 23°C in Idaho Falls in September, falling to 5°C at night.

How sunny is it in Idaho Falls in September?

There are normally 10 hours of bright sunshine each day in Idaho Falls in September - that's 76% of daylight hours.

Does it rain in Idaho Falls in September?

There are usually 6 days with some rain in Idaho Falls in September and the average monthly rainfall is 22mm.

Idaho Falls September sunrise & sunset times

Browse the sunrise and sunset times for Idaho Falls in September 2025. Select a month to view Idaho Falls sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:52 19:03
Monday, 15th September 2025 06:08 18:38
Tuesday, 30th September 2025 06:25 18:10

Related posts

Popular travel offers

Explore holidays in the sun for less

More holidays

Airport parking

More parking

Airport lounges

More lounges

Top ^