Frost dates and growing zones in Idaho

4 town pages so far. Zones from the 2023 USDA Plant Hardiness Zone Map, frost dates from NOAA 1991-2020 normals at the nearest weather station.

Towns covered so far in Idaho fall in USDA zones 6a, 7a. Median dates mean frost comes later (spring) or earlier (fall) in half of years.

Towns

Town	Zone	Median last frost	Median first frost
Meridian	7a	Apr 24	Oct 21
Caldwell	7a	Apr 29	Oct 13
Pocatello	6a	May 16	Oct 2
Coeur d'Alene	7a	Apr 22	Oct 18