Post Falls, ID Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Post Falls, a city in Kootenai County, Idaho.
Overnight
50°F
Haze
Haze and areas of smoke. Mostly clear, with a low around 50. East wind around 2 mph.
7-day forecast for Post Falls
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 50°F | Haze | 2 mph E | 0% |
| Tuesday | 84°F | Haze then Sunny | 5 mph N | 0% |
| Tuesday Night | 53°F | Haze | 3 mph NE | 0% |
| Wednesday | 89°F | Sunny | 1 to 5 mph S | 0% |
| Wednesday Night | 56°F | Mostly Clear | 3 mph S | 0% |
| Thursday | 94°F | Sunny | 2 to 6 mph S | 0% |
| Thursday Night | 59°F | Mostly Clear | 2 to 6 mph S | 0% |
| Friday | 93°F | Sunny | 3 to 10 mph S | 0% |
| Friday Night | 58°F | Mostly Clear | 3 to 10 mph SW | 0% |
| Saturday | 90°F | Sunny | 3 to 9 mph SW | 0% |
| Saturday Night | 56°F | Mostly Clear | 3 to 9 mph S | 0% |
| Sunday | 86°F | Sunny | 5 to 8 mph SW | 0% |
| Sunday Night | 54°F | Mostly Clear | 2 to 7 mph S | 0% |
| Monday | 85°F | Sunny | 2 to 6 mph S | 0% |
Forecast source: National Weather Service (api.weather.gov) for Post Falls (47.726, -116.944). Updated through the day.
Growing snapshot for Post Falls
Last spring frost
Apr 22
First fall frost
Oct 18
Growing season
179 days
Hardiness zone
6b
More local growing data for Post Falls: nearby ZIP 83854 weather · frost dates · planting calendar · Idaho frost dates
Nearby towns & communities
Athol
Coeur d'Alene
Dalton Gardens
Fernan Lake Village
Harrison
Hauser
Hayden
Hayden Lake
Huetter
Rathdrum
Rockford Bay
Spirit Lake
State Line
Worley
Climate data from the nearest NOAA station, Coeur D'alene, Id (8.9 mi from Post Falls). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.