Hamilton City, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Hamilton City, a community in Glenn County, California.
This Afternoon
58°F
Slight Chance Light Rain
A slight chance of rain. Mostly cloudy. High near 58, with temperatures falling to around 56 in the afternoon. North wind around 5 mph. Chance of precipitation is 20%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Hamilton City
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 58°F | Slight Chance Light Rain | 5 mph N | 24% |
| Tonight | 44°F | Partly Cloudy | 3 to 8 mph NNW | 6% |
| Wednesday | 68°F | Sunny | 3 to 10 mph NNW | 0% |
| Wednesday Night | 45°F | Patchy Fog then Partly Cloudy | 1 to 6 mph NNW | 0% |
| Thursday | 73°F | Sunny | 6 to 12 mph NNW | 0% |
| Thursday Night | 43°F | Mostly Clear | 2 to 7 mph NNW | 0% |
| Friday | 74°F | Sunny | 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 ENE | 0% |
| Sunday | 73°F | Mostly Sunny | 3 mph WNW | 0% |
| Sunday Night | 47°F | Partly Cloudy | 2 mph W | 1% |
| Monday | 71°F | Mostly Sunny | 2 mph NNW | 3% |
| Monday Night | 47°F | Partly Cloudy | 3 mph N | 3% |
Forecast source: National Weather Service (api.weather.gov) for Hamilton City (39.743, -122.011). Updated through the day.
Growing snapshot for Hamilton City
Last spring frost
Mar 4
First fall frost
Nov 17
Growing season
257 days
Hardiness zone
9b
More local growing data for Hamilton City: nearby ZIP 95951 weather · frost dates · planting calendar · California frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Chico Univ Farm, Ca (10 mi from Hamilton City). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.