Post Falls, ID Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Post Falls, a city in Kootenai County, Idaho.
Tonight
35°F
Partly Cloudy then Patchy Fog
Patchy fog after 5am. Partly cloudy, with a low around 35. East wind around 1 mph.
7-day forecast for Post Falls
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 35°F | Partly Cloudy then Patchy Fog | 1 mph E | 2% |
| Wednesday | 52°F | Patchy Fog then Sunny | 2 mph S | 2% |
| Wednesday Night | 36°F | Patchy Fog then Rain Showers | 3 mph E | 88% |
| Thursday | 48°F | Rain Showers | 6 mph S | 88% |
| Thursday Night | 36°F | Mostly Cloudy | 3 mph SE | 1% |
| Friday | 51°F | Mostly Cloudy | 5 mph SE | 5% |
| Friday Night | 38°F | Mostly Cloudy | 5 mph SE | 10% |
| Saturday | 59°F | Partly Sunny | 3 mph E | 7% |
| Saturday Night | 40°F | Mostly Cloudy then Slight Chance Rain Showers | 5 mph E | 23% |
| Sunday | 54°F | Slight Chance Rain Showers | 5 to 10 mph S | 23% |
| Sunday Night | 38°F | Mostly Cloudy | 2 to 7 mph S | 5% |
| Monday | 54°F | Mostly Cloudy then Slight Chance Rain Showers | 3 mph NE | 15% |
| Monday Night | 38°F | Chance Rain Showers | 2 mph E | 27% |
| Tuesday | 55°F | Chance Rain Showers | 3 mph S | 27% |
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 Nov 4, 2026.