McArthur, CA Weather & Growing Conditions
Overnight
54°F
Haze
Haze and patchy smoke. Clear, with a low around 54. Northeast wind around 0 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 54°F | Haze | 0 mph | 0% |
| Tuesday | 95°F | Haze | 0 to 10 mph N | 0% |
| Tuesday Night | 60°F | Mostly Clear | 0 to 10 mph NE | 0% |
| Wednesday | 93°F | Sunny | 0 to 10 mph W | 0% |
| Wednesday Night | 58°F | Clear | 0 to 10 mph S | 0% |
| Thursday | 94°F | Sunny | 0 to 10 mph SE | 0% |
| Thursday Night | 59°F | Clear | 0 to 10 mph S | 0% |
| Friday | 94°F | Sunny | 0 to 10 mph NW | 0% |
| Friday Night | 60°F | Clear | 0 to 10 mph E | 0% |
| Saturday | 94°F | Sunny | 0 to 10 mph N | 0% |
| Saturday Night | 59°F | Clear | 0 to 10 mph NE | 0% |
| Sunday | 91°F | Sunny | 0 to 10 mph N | 0% |
| Sunday Night | 57°F | Mostly Clear | 0 to 10 mph NE | 0% |
| Monday | 88°F | Sunny | 0 to 15 mph N | 0% |
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 Aug 4, 2026.