Princeton, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Princeton, a community in Colusa County, California.
Overnight
55°F
Clear
Clear. Low around 55, with temperatures rising to around 57 overnight. North northwest wind around 2 mph.
7-day forecast for Princeton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 55°F | Clear | 2 mph NNW | 0% |
| Saturday | 92°F | Sunny | 3 mph NNW | 0% |
| Saturday Night | 56°F | Partly Cloudy | 0 to 3 mph ESE | 0% |
| Sunday | 86°F | Partly Sunny | 3 mph SE | 0% |
| Sunday Night | 56°F | Mostly Cloudy | 3 mph SE | 0% |
| Monday | 89°F | Sunny | 1 to 5 mph SSE | 0% |
| Monday Night | 56°F | Mostly Clear | 0 to 5 mph SE | 0% |
| Tuesday | 88°F | Sunny | 1 to 5 mph SE | 0% |
| Tuesday Night | 56°F | Clear | 0 to 5 mph ESE | 0% |
| Wednesday | 90°F | Sunny | 2 mph NE | 0% |
| Wednesday Night | 57°F | Mostly Clear | 2 mph NNE | 0% |
| Thursday | 92°F | Sunny | 1 to 5 mph E | 0% |
| Thursday Night | 58°F | Mostly Clear | 1 to 5 mph S | 1% |
| Friday | 88°F | Mostly Sunny | 1 to 5 mph SSE | 1% |
Forecast source: National Weather Service (api.weather.gov) for Princeton (39.402, -122.019). Updated through the day.
Growing snapshot for Princeton
Last spring frost
Feb 14
First fall frost
Dec 1
Growing season
293 days
Hardiness zone
9b
More local growing data for Princeton: nearby ZIP 95970 weather · frost dates · planting calendar · California frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Colusa 2 Ssw, Ca (15.5 mi from Princeton). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.