Colusa, CA Weather & Growing Conditions
Tonight
55°F
Clear
Clear. Low around 55, with temperatures rising to around 57 overnight. Northwest wind around 1 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 55°F | Clear | 1 mph NW | 0% |
| Saturday | 92°F | Sunny | 3 mph NW | 0% |
| Saturday Night | 57°F | Partly Cloudy | 3 mph SSE | 0% |
| Sunday | 87°F | Partly Sunny | 1 to 5 mph SE | 0% |
| Sunday Night | 57°F | Mostly Cloudy | 1 to 5 mph SE | 0% |
| Monday | 90°F | Mostly Sunny | 1 to 5 mph SE | 0% |
| Monday Night | 57°F | Mostly Clear | 1 to 7 mph SE | 0% |
| Tuesday | 91°F | Sunny | 3 mph SE | 0% |
| Tuesday Night | 58°F | Mostly Clear | 0 to 5 mph ESE | 0% |
| Wednesday | 93°F | Sunny | 0 to 3 mph NNE | 0% |
| Wednesday Night | 59°F | Mostly Clear | 0 to 3 mph ENE | 0% |
| Thursday | 94°F | Sunny | 1 to 5 mph E | 0% |
| Thursday Night | 59°F | Mostly Clear | 1 to 5 mph SSE | 0% |
| Friday | 91°F | Sunny | 2 to 6 mph E | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Colusa, CA
Last spring frost
Feb 14
First fall frost
Dec 1
Growing season
293 days
Hardiness zone
9b
Explore more for Colusa, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Colusa 2 Ssw, Ca (4.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.