Post Mountain, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Post Mountain, a community in Trinity County, California.
Overnight
64°F
Clear
Clear, with a low around 64. North northeast wind around 2 mph.
7-day forecast for Post Mountain
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 64°F | Clear | 2 mph NNE | 0% |
| Tuesday | 97°F | Sunny | 1 to 9 mph NW | 0% |
| Tuesday Night | 65°F | Mostly Clear | 0 to 9 mph WSW | 0% |
| Wednesday | 95°F | Sunny | 1 to 7 mph ESE | 0% |
| Wednesday Night | 64°F | Clear | 0 to 5 mph SW | 0% |
| Thursday | 94°F | Sunny | 1 to 5 mph SSE | 0% |
| Thursday Night | 63°F | Clear | 0 to 5 mph WNW | 0% |
| Friday | 95°F | Sunny | 0 to 7 mph N | 0% |
| Friday Night | 63°F | Clear | 0 to 7 mph NW | 0% |
| Saturday | 93°F | Sunny | 0 to 8 mph NW | 0% |
| Saturday Night | 60°F | Clear | 0 to 8 mph NW | 0% |
| Sunday | 90°F | Sunny | 0 to 8 mph NNW | 0% |
| Sunday Night | 58°F | Mostly Clear | 0 to 8 mph NW | 0% |
| Monday | 88°F | Sunny | 0 to 7 mph N | 0% |
Forecast source: National Weather Service (api.weather.gov) for Post Mountain (40.416, -123.232). Updated through the day.
Growing snapshot for Post Mountain
Last spring frost
Apr 16
First fall frost
Oct 31
Growing season
197 days
Hardiness zone
8b
More local growing data for Post Mountain: nearby ZIP 96041 weather · frost dates · planting calendar · California frost dates
Nearby towns & communities
Burnt Ranch
Coffee Creek
Douglas City
Hayfork
Hyampom
Junction City
Lewiston
Mad River
Platina
Ruth
Salyer
Trinity Center
Trinity Village
Weaverville
Climate data from the nearest NOAA station, Big Bar 4 E, Ca (15.7 mi from Post Mountain). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.