Idaho Frost Dates
Across Idaho, the average last spring frost ranges from Apr 6 in Lewiston to May 23 in Shelley. Find your town below, or enter your ZIP code for the nearest station.
Largest cities
Boise CityMeridianNampaCaldwellIdaho FallsPocatelloCoeur d'AleneTwin FallsPost FallsRexburgLewistonEagle
Average frost dates in Idaho towns
Average (50%) dates of the last 32°F frost in spring and the first in fall, from the nearest NOAA station. Towns with 5,000+ residents.
| Town | Last frost | First frost | Season (days) |
|---|---|---|---|
| Ammon | May 9 | Oct 1 | 142 |
| Blackfoot | May 5 | Oct 3 | 149 |
| Boise City | Apr 24 | Oct 21 | 179 |
| Burley | May 7 | Oct 4 | 150 |
| Caldwell | Apr 29 | Oct 13 | 164 |
| Chubbuck | May 16 | Oct 2 | 137 |
| Coeur d'Alene | Apr 22 | Oct 18 | 179 |
| Eagle | Apr 30 | Oct 17 | 168 |
| Emmett | Apr 30 | Oct 17 | 168 |
| Fruitland | Apr 22 | Oct 9 | 168 |
| Garden City | May 17 | Oct 12 | 147 |
| Hailey | May 13 | Oct 2 | 139 |
| Hayden | Apr 22 | Oct 18 | 179 |
| Idaho Falls | May 9 | Oct 1 | 142 |
| Jerome | May 2 | Oct 14 | 166 |
| Kimberly | May 6 | Oct 3 | 150 |
| Kuna | Apr 24 | Oct 21 | 179 |
| Lewiston | Apr 6 | Oct 26 | 200 |
| Meridian | Apr 24 | Oct 21 | 179 |
| Middleton | Apr 29 | Oct 13 | 164 |
| Moscow | Apr 29 | Oct 2 | 159 |
| Mountain Home | May 2 | Oct 8 | 157 |
| Nampa | Apr 29 | Oct 13 | 164 |
| Payette | Apr 19 | Oct 20 | 183 |
| Pocatello | May 2 | Oct 11 | 161 |
| Post Falls | Apr 22 | Oct 18 | 179 |
| Preston | May 16 | Sep 28 | 133 |
| Rathdrum | Apr 22 | Oct 18 | 179 |
| Rexburg | May 12 | Sep 24 | 132 |
| Rigby | May 9 | Oct 5 | 148 |
| Rupert | May 6 | Oct 6 | 151 |
| Sandpoint | May 8 | Sep 28 | 141 |
| Shelley | May 23 | Sep 20 | 114 |
| Star | Apr 29 | Oct 13 | 164 |
| Twin Falls | Apr 30 | Oct 9 | 161 |
| Weiser | Apr 23 | Oct 13 | 174 |