McArthur, CA Weather & Growing Conditions
This Afternoon
49°F
Light Rain Likely
Rain likely. Mostly cloudy, with a high near 49. Northwest wind around 5 mph. Chance of precipitation is 60%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 49°F | Light Rain Likely | 5 mph NW | 59% |
| Tonight | 32°F | Slight Chance Light Rain then Mostly Cloudy | 0 to 5 mph NW | 21% |
| Wednesday | 55°F | Mostly Sunny | 0 mph | 0% |
| Wednesday Night | 31°F | Partly Cloudy | 0 mph | 0% |
| Thursday | 57°F | Sunny | 0 to 5 mph NE | 0% |
| Thursday Night | 31°F | Mostly Clear | 0 to 5 mph NE | 0% |
| Friday | 64°F | Mostly Sunny | 0 mph | 0% |
| Friday Night | 34°F | Mostly Clear | 0 to 10 mph NE | 0% |
| Saturday | 66°F | Sunny | 0 to 5 mph E | 0% |
| Saturday Night | 35°F | Partly Cloudy | 0 to 5 mph SE | 0% |
| Sunday | 62°F | Partly Sunny | 0 to 5 mph S | 0% |
| Sunday Night | 35°F | Mostly Cloudy | 0 to 5 mph NE | 1% |
| Monday | 60°F | Partly Sunny | 0 to 5 mph S | 4% |
| Monday Night | 33°F | Partly Cloudy | 0 to 5 mph SE | 4% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for McArthur, CA
Last spring frost
May 29
First fall frost
Sep 19
Growing season
113 days
Hardiness zone
7a
Explore more for McArthur, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Hat Creek, Ca (15 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.