Idaho Falls weather in December 2025

Expect -1°C daytime maximum temperatures in the shade with on average 4 hours of sunshine per day in Idaho Falls in December. Check more long-term weather averages for Idaho Falls in December before you book your next holiday to Idaho in 2025/2026.

  • -1°C maximum daytime temperature in December in Idaho Falls-1
    -1°C max day temperature
  • 4 hours of sunshine per day
  • 11 days with some rainfall in December in Idaho Falls11
    11 days with some rainfall
  • -11°C minimum night-time temperature in December in Idaho Falls-11
    -11°C min night temperature
  • 9 hours of daylight per day in December in Idaho Falls9
    9 hours of daylight per day
  • No heat & humidity in December in Idaho Falls0
    No heat & humidity
  • 23 mm monthly rainfall in December in Idaho Falls23
    23 mm of monthly rainfall
  • UV (maximum) index 1 (Low) in December in Idaho Falls1
    1 (Low) UV index

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The December 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)

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How cold is it in Idaho Falls in December?

Daytime temperatures usually reach -1°C in Idaho Falls in December, falling to -11°C at night.

How sunny is it in Idaho Falls in December?

There are normally 4 hours of bright sunshine each day in Idaho Falls in December - that's 41% of daylight hours.

Does it rain in Idaho Falls in December?

There are usually 11 days with some rain in Idaho Falls in December and the average monthly rainfall is 23mm. Rain may fall as snow in this month.

Idaho Falls December sunrise & sunset times

Browse the sunrise and sunset times for Idaho Falls in December 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 December 2025 07:42 16:53
Tuesday, 16th December 2025 07:55 16:53
Wednesday, 31st December 2025 08:01 17:02

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