Post Falls, ID Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Post Falls, a city in Kootenai County, Idaho.
This Afternoon
77°F
Sunny
Sunny. High near 77, with temperatures falling to around 75 in the afternoon. West wind around 3 mph.
7-day forecast for Post Falls
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 77°F | Sunny | 3 mph W | 0% |
| Tonight | 51°F | Mostly Clear | 2 mph E | 0% |
| Sunday | 80°F | Sunny | 2 mph NE | 0% |
| Sunday Night | 51°F | Mostly Clear | 2 mph NE | 0% |
| Monday | 82°F | Sunny | 3 mph S | 0% |
| Monday Night | 53°F | Partly Cloudy | 2 mph SE | 0% |
| Tuesday | 79°F | Mostly Sunny | 2 to 6 mph S | 0% |
| Tuesday Night | 52°F | Partly Cloudy | 5 mph S | 2% |
| Wednesday | 72°F | Mostly Sunny | 3 to 7 mph SW | 1% |
| Wednesday Night | 49°F | Partly Cloudy | 2 to 6 mph S | 1% |
| Thursday | 70°F | Mostly Sunny | 3 mph SE | 5% |
| Thursday Night | 49°F | Mostly Cloudy | 2 mph NE | 9% |
| Friday | 68°F | Slight Chance Rain Showers | 5 mph SW | 15% |
| Friday Night | 47°F | Slight Chance Rain Showers | 3 mph SW | 15% |
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 Sep 19, 2026.