Idaho weather in January 2025

Expect 2°C daytime maximum temperatures in the shade with on average 4 hours of sunshine per day in Idaho in January. Check more long-term weather averages for Idaho in January before you book your next holiday to Idaho in 2025/2026.

  • 2°C maximum daytime temperature in January in Idaho (Boise)2
    2°C max day temperature
  • 4 hours of sunshine per day
  • 12 days with some rainfall in January in Idaho (Boise)12
    12 days with some rainfall
  • -6°C minimum night-time temperature in January in Idaho (Boise)-6
    -6°C min night temperature
  • 9 hours of daylight per day in January in Idaho (Boise)9
    9 hours of daylight per day
  • No heat & humidity in January in Idaho (Boise)0
    No heat & humidity
  • 38 mm monthly rainfall in January in Idaho (Boise)38
    38 mm of monthly rainfall
  • UV (maximum) index 1 (Low) in January in Idaho (Boise)1
    1 (Low) 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 January weather guide for Idaho (Boise) 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.

Top Idaho destinations

Below are average maximum temperatures at popular countries and places in Idaho in January. Select a holiday destination to see more weather parameters.

All Idaho destinations

Metric (°C / mm)  |  Imperial (°F / inches)

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More about the USA

How cold is it in Idaho in January?

Daytime temperatures usually reach 2°C in Boise, Idaho in January, falling to -6°C at night.

How sunny is it in Idaho in January?

There are normally 4 hours of bright sunshine each day in Boise, Idaho in January - that's 38% of daylight hours.

Does it rain in Idaho in January?

There are usually 12 days with some rain in Boise, Idaho in January and the average monthly rainfall is 38mm. Rain may fall as snow in this month.

Idaho January sunrise & sunset times

Browse the sunrise and sunset times for Idaho in January 2025. Select a month to view Idaho sunrise and sunset times for the next 12 months. The Idaho sunrise and sunset times shown below are for Boise.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Wednesday, 1st January 2025 08:18 17:19
Thursday, 16th January 2025 08:14 17:36
Friday, 31st January 2025 08:02 17:55

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