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

Chance Rain Showers then Patchy Fog

A chance of rain showers before 10pm, then patchy fog. Mostly 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	Chance Rain Showers then Patchy Fog	1 mph E	12%
Wednesday	52°F	Patchy Fog then Sunny	2 mph SW	2%
Wednesday Night	36°F	Mostly Cloudy then Rain Showers Likely	3 mph SE	72%
Thursday	48°F	Rain Showers Likely	3 to 7 mph SW	72%
Thursday Night	36°F	Mostly Cloudy	3 mph SE	7%
Friday	52°F	Mostly Cloudy	6 mph SE	13%
Friday Night	39°F	Mostly Cloudy	5 mph SE	6%
Saturday	58°F	Partly Sunny	3 mph E	6%
Saturday Night	41°F	Mostly Cloudy then Chance Rain Showers	2 to 6 mph SE	33%
Sunday	56°F	Chance Rain Showers	6 to 13 mph SW	33%
Sunday Night	38°F	Slight Chance Rain Showers then Mostly Cloudy	2 to 8 mph S	15%
Monday	54°F	Partly Sunny then Slight Chance Rain Showers	3 mph NE	17%
Monday Night	39°F	Chance Rain Showers	3 mph SE	25%
Tuesday	56°F	Chance Rain Showers	3 mph S	34%

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

More local growing data for Post Falls: nearby ZIP 83854 weather · frost dates · planting calendar · Idaho frost dates

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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.