Average Temperatures for Idaho in August





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

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

The tables give the normals for maximum and minimum temperatures based on weather data collected from 1991 to 2020 by the US National Centers for Environmental Information.

Eastern Idaho

Average August temperatures
High °F Low °F Place High °C Low °C
82 46 Driggs 28 8
86 48 Idaho Falls 30 9
77 40 Island Park 25 4
88 50 Malad City 31 10
89 57 Pocatello 31 14
87 52 Preston 31 11
83 49 Saint Anthony 28 9

Central Idaho

Average daily temperatures in August
High °F Low °F Place High °C Low °C
80 47 Craters of the Moon Monument 27 8
79 44 Ketchum 26 6
88 52 Lake Walcott, Minidoka Dam 31 11
85 46 Middle Fork Lodge 29 8
85 49 Salmon 29 9
85 51 St. Maries 29 11
79 32 Stanley, Sawtooth Recreation Area 26 0
86 53 Twin Falls 30 12

Southwestern Idaho

August temperatures: daily averages
High °F Low °F Place High °C Low °C
91 61 Boise 33 16
94 63 Brownlee Reservoir Dam 35 17
94 58 Bruneau 35 15
86 44 Idaho City 30 6
89 57 Lake Lowell, Deer Flat Dam 32 14
81 43 McCall 27 6
93 58 Mountain Home 34 14

Northern Idaho

Average August temperatures
High °F Low °F Place High °C Low °C
85 52 Bonners Ferry 29 11
83 56 Coeur d’Alene 28 13
83 39 Elk City 28 4
84 49 Kellogg 29 9
90 60 Lewiston 32 16
86 45 Moscow 30 7
81 48 Mullan 27 9
86 50 Porthill 30 10
82 44 Powell 28 6
90 52 Riggins 32 11
82 50 Sandpoint 28 10
81 50 Wallace 27 10
Reference

NOAA National Centers for Environmental Information (NCEI). Climate Normals.

Idaho Temperatures
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