Boise weather in January 2026

Expect 2°C daytime maximum temperatures in the shade with on average 4 hours of sunshine per day in Boise in January based on long-term weather averages. There is usually 12 days with some rainfall and 38 mm of average monthly rainfall in January.

  • 2°C maximum daytime temperature in January in Boise2
    2°C max day temperature
  • 4 hours of sunshine per day
  • 12 days with some rainfall in January in Boise12
    12 days with some rainfall
  • -6°C minimum night-time temperature in January in Boise-6
    -6°C min night temperature
  • 9 hours of daylight per day in January in Boise9
    9 hours of daylight per day
  • No heat & humidity in January in Boise0
    No heat & humidity
  • 38 mm monthly rainfall in January in Boise38
    38 mm of monthly rainfall
  • UV (maximum) index 1 (Low) in January in Boise1
    1 (Low) UV index

More about Boise

Boise by month

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

Recommended for Idaho

Booking.com: Latest worldwide hotel deals

  • Check out latest hotel deals worldwide with Booking.com
  • Find trending hotels, popular destinations & more
  • Search for specific destinations & dates or by hotel type
Go to Booking.com deal >>

View all Booking.com offers

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.

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

Back to top

More about the USA

How cold is it in Boise in January?

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

How sunny is it in Boise in January?

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

Does it rain in Boise in January?

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

Boise January sunrise & sunset times

Browse the sunrise and sunset times for Boise in January 2026. Select a month to view Boise sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st January 2026 08:18 17:19
Friday, 16th January 2026 08:14 17:35
Saturday, 31st January 2026 08:02 17:55

Related posts

Popular travel offers

Explore holidays in the sun for less

More holidays

Airport parking

More parking

Airport lounges

More lounges

Top ^