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Idaho Weather Records

Weather averages and records for the U.S. state of Idaho based on data made available by the NOAA.
Idaho Statewide Averages
Average temperatures and precipitation over the entire territory of the state, from 1991–2020.
Month High (°F) Low (°F) Precipitation (in)
January 33.2 17.1 2.8
February 37.4 18.7 2.2
March 45.9 24.6 2.4
April 53.2 29.8 2.2
May 62.9 37.4 2.3
June 71.2 43.7 1.8
July 82.3 50.5 0.7
August 81.3 49.2 0.7
September 71.2 41.6 1.1
October 56.2 32.3 1.9
November 41.5 23.5 2.5
December 32.4 16.9 3.0
Entire Year 55.7 32.1 23.7
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Idaho Average Temperature by Year
Idaho Cities
Yearly weather averages for various places in Idaho, from 1991–2020.
City Average (°F) Record (°F) Yearly (inches)
High Low High Low Precipitation Snow
Boise 64.4 41.7 111 -25 11.5 17.6
Bonners Ferry 58.1 36.7 108 -33 21.4 53.7
Burley 61.8 36.6 107 -35 10.1 n/a
Coeur d'Alene 58.4 39.3 109 -30 25.2 n/a
Emmett 64.2 38.8 111 -27 13.3 6.9
Hamer 58.9 28.1 105 -48 8.7 23.2
Idaho Falls 58.0 31.3 102 -38 9.8 n/a
Jerome 63.8 36.7 110 -25 10.4 n/a
Kellogg 58.6 36.3 111 -36 33.8 52.2
Ketchum 54.7 26.1 98 -46 17.6 104.1
Lewiston 64.0 43.1 117 -22 12.8 12.3
McCall 55.3 28.2 104 -35 24.2 126.5
Moscow 59.8 36.0 109 -42 27.7 50.3
Pierce 56.8 30.7 108 -44 41.9 112.2
Pocatello 60.6 33.6 104 -33 11.8 38.1
Preston 60.5 33.6 110 -31 16.8 49.3
Rexburg 56.8 32.0 102 -36 12.6 n/a
Salmon 58.5 32.4 105 -34 9.3 23.4
Sandpoint 57.3 35.6 106 -37 33.3 55.3
St. Maries 58.6 37.0 110 -29 32.0 57.0
Twin Falls 62.0 37.8 107 -24 10.3 n/a