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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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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