Sun Valley weather in October 2025

Expect 13°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Sun Valley in October. Check more long-term weather averages for Sun Valley in October before you book your next holiday to Idaho in 2025/2026.

  • 13°C maximum daytime temperature in October in Sun Valley13
    13°C max day temperature
  • 7 hours of sunshine per day
  • 7 days with some rainfall in October in Sun Valley7
    7 days with some rainfall
  • -4°C minimum night-time temperature in October in Sun Valley-4
    -4°C min night temperature
  • 11 hours of daylight per day in October in Sun Valley11
    11 hours of daylight per day
  • No heat & humidity in October in Sun Valley0
    No heat & humidity
  • 29 mm monthly rainfall in October in Sun Valley29
    29 mm of monthly rainfall
  • UV (maximum) index 4 (Moderate) in October in Sun Valley4
    4 (Moderate) UV index

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Recommended for Idaho

  • Kids stay & eat for free at Marriot Bonvoy
  • Destinations include Europe, Middle East & Africa
  • Valid for up to 2 adults & 2 kids aged up to 12

The October weather guide for Idaho (Sun Valley) 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)

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How warm is it in Sun Valley in October?

Daytime temperatures usually reach 13°C in Sun Valley in October, falling to -4°C at night.

How sunny is it in Sun Valley in October?

There are normally 7 hours of bright sunshine each day in Sun Valley in October - that's 66% of daylight hours.

Does it rain in Sun Valley in October?

There are usually 7 days with some rain in Sun Valley in October and the average monthly rainfall is 29mm.

Sun Valley October sunrise & sunset times

Browse the sunrise and sunset times for Sun Valley in October 2025. Select a month to view Sun Valley sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Wednesday, 1st October 2025 06:35 18:18
Thursday, 16th October 2025 06:53 17:52
Friday, 31st October 2025 07:12 17:29

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