Grimes, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Grimes, a community in Colusa County, California.
This Afternoon
56°F
Light Rain Likely
Rain likely before 1pm, then haze and rain likely. Mostly cloudy, with a high near 56. East northeast wind around 6 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Grimes
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 56°F | Light Rain Likely | 6 mph ENE | 59% |
| Tonight | 46°F | Slight Chance Light Rain then Partly Cloudy | 3 to 7 mph NNW | 15% |
| Wednesday | 68°F | Sunny | 2 to 10 mph NW | 0% |
| Wednesday Night | 46°F | Patchy Fog | 0 to 3 mph NW | 0% |
| Thursday | 73°F | Sunny | 3 to 8 mph NNW | 0% |
| Thursday Night | 43°F | Mostly Clear | 3 mph NW | 0% |
| Friday | 72°F | Sunny | 1 to 5 mph NNW | 0% |
| Friday Night | 45°F | Mostly Clear | 1 mph NNE | 0% |
| Saturday | 72°F | Sunny | 2 mph NNW | 0% |
| Saturday Night | 46°F | Mostly Clear | 2 mph NNW | 0% |
| Sunday | 71°F | Mostly Sunny | 1 to 5 mph NNW | 0% |
| Sunday Night | 47°F | Partly Cloudy | 1 mph NE | 0% |
| Monday | 70°F | Partly Sunny | 3 mph N | 1% |
| Monday Night | 47°F | Partly Cloudy | 2 mph WSW | 3% |
Forecast source: National Weather Service (api.weather.gov) for Grimes (39.074, -121.899). Updated through the day.
Growing snapshot for Grimes
Last spring frost
Feb 14
First fall frost
Dec 1
Growing season
293 days
Hardiness zone
9b
More local growing data for Grimes: nearby ZIP 95950 weather · frost dates · planting calendar · California frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Colusa 2 Ssw, Ca (11.5 mi from Grimes). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.