Hamilton City, CA Weather & Growing Conditions
Tonight
43°F
Partly Cloudy
Partly cloudy. Low around 43, with temperatures rising to around 45 overnight. North northwest wind 3 to 8 mph, with gusts as high as 18 mph. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 43°F | Partly Cloudy | 3 to 8 mph NNW | 3% |
| Wednesday | 68°F | Sunny | 3 to 10 mph NNW | 0% |
| Wednesday Night | 44°F | Patchy Fog | 1 to 6 mph NNW | 0% |
| Thursday | 73°F | Sunny | 6 to 12 mph NNW | 0% |
| Thursday Night | 43°F | Mostly Clear | 1 to 7 mph NNW | 0% |
| Friday | 74°F | Sunny | 1 to 5 mph NNW | 0% |
| Friday Night | 44°F | Mostly Clear | 2 mph NE | 0% |
| Saturday | 73°F | Sunny | 3 mph NW | 0% |
| Saturday Night | 45°F | Mostly Clear | 0 to 3 mph NNE | 0% |
| Sunday | 73°F | Mostly Sunny | 3 mph WNW | 0% |
| Sunday Night | 46°F | Partly Cloudy | 2 mph N | 1% |
| Monday | 71°F | Mostly Sunny | 2 mph NNW | 3% |
| Monday Night | 46°F | Partly Cloudy | 3 mph NE | 3% |
| Tuesday | 72°F | Mostly Sunny | 5 mph WNW | 14% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Hamilton City, CA
Last spring frost
Mar 4
First fall frost
Nov 17
Growing season
257 days
Hardiness zone
9b
Explore more for Hamilton City, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Chico Univ Farm, Ca (10 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.