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Idaho weather by month

One station — Boise sits in the state’s warm southwestern valley, so the mountain towns and the panhandle run colder and snowier than these rows.

Based on 1 weather station, in Boise.

The year across Idaho

Month Highs Nights Wet days
January 39° 26° 5
February 46° 29° 3
March 56° 35° 5
April 62° 40° 4
May 72° 48° 4
June 81° 54° 2
July 93° 62° 1
August 91° 61° 0
September 80° 53° 1
October 65° 42° 2
November 49° 32° 2
December 39° 25° 6

Boise & the Treasure Valley