Hottest Cities in Idaho.
Cities in Idaho with the highest average summer temperatures, from 30-year averages at the nearest weather station.
25 cities ranked · See the national list
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| # | City | Avg Summer High |
|---|---|---|
| 1 | Mountain Home | 92°F |
| 2 | Nampa | 89°F |
| 3 | Caldwell | 89°F |
| 4 | Star | 89°F |
| 5 | Middleton | 89°F |
| 6 | Boise | 88°F |
| 7 | Meridian | 88°F |
| 8 | Twin Falls | 88°F |
| 9 | Eagle | 88°F |
| 10 | Kuna | 88°F |
| 11 | Garden City | 88°F |
| 12 | Lewiston | 87°F |
| 13 | Pocatello | 86°F |
| 14 | Jerome | 86°F |
| 15 | Chubbuck | 85°F |
| 16 | Burley | 84°F |
| 17 | Idaho Falls | 83°F |
| 18 | Ammon | 83°F |
| 19 | Blackfoot | 83°F |
| 20 | Rexburg | 81°F |
| 21 | Moscow | 81°F |
| 22 | Coeur d'Alene | 79°F |
| 23 | Post Falls | 79°F |
| 24 | Hayden | 79°F |
| 25 | Rathdrum | 79°F |
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