Average Annual Temperatures in Idaho

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Average annual temperatures for cities, towns, parks and lakes throughout Idaho are listed below in degrees Fahrenheit and Celsius.

The tables give the normals for maximum and minimum yearly temperatures based on weather data collected from 1981 to 2010.

You can jump to a separate table for each region of the state: Eastern, Central, Southwestern and Northern Idaho.

Eastern Idaho

Average annual temperatures
High °F Low °F Place High °C Low °C
53 27 Driggs 12 -3
57 31 Idaho Falls 14  0
54 24 Island Park 12 -4
60 32 Malad City 16  0
61 36 Pocatello 16  2
59 33 Preston 15  0
56 28 Saint Anthony 13 -2

Central Idaho

Average temperatures for the year
High °F Low °F Place High °C Low °C
55 31 Craters of the Moon Monument 13 -1
55 24 Grouse 13 -4
55 26 Ketchum 13 -3
61 33 Lake Walcott, Minidoka Dam 16  1
59 29 Middle Fork Lodge 15 -2
57 31 Salmon 14  0
52 18 Stanley, Sawtooth Recreation Area 11 -8
60 35 Twin Falls 16  2

Southwestern Idaho

Average yearly temperatures
High °F Low °F Place High °C Low °C
64 41 Boise 18  5
65 45 Brownlee Reservoir Dam 18  7
68 41 Bruneau 20  5
60 28 Idaho City 15 -2
65 41 Lake Lowell, Deer Flat Dam 18  5
54 27 McCall 12 -3
65 38 Mountain Home 18  3

Northern Idaho

Annual average temperature
High °F Low °F Place High °C Low °C
58 39 Coeur d’Alene 14  4
57 27 Elk City 14 -3
58 36 Kellogg 14  2
64 43 Lewiston 18  6
60 36 Moscow 15  2
58 35 Porthill 14  2
55 30 Powell 13 -1
66 41 Riggins 19  5
57 35 Sandpoint 14  2
56 36 Wallace 13  2
Reference

National Climatic Data Center. NOAA's 1981-2010 Climate Normals.

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