McArthur, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for McArthur, a community in Shasta County, California.
Today
96°F
Sunny
Sunny, with a high near 96. North northwest wind 1 to 9 mph.
7-day forecast for McArthur
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 96°F | Sunny | 1 to 9 mph NNW | 0% |
| Tonight | 56°F | Mostly Clear | 1 to 8 mph SE | 0% |
| Wednesday | 94°F | Sunny | 1 to 10 mph WNW | 0% |
| Wednesday Night | 54°F | Clear | 1 to 10 mph S | 0% |
| Thursday | 95°F | Sunny | 1 to 12 mph S | 0% |
| Thursday Night | 55°F | Clear | 1 to 12 mph SSE | 0% |
| Friday | 95°F | Sunny | 1 to 12 mph W | 0% |
| Friday Night | 56°F | Clear | 0 to 12 mph ESE | 0% |
| Saturday | 95°F | Sunny | 0 to 12 mph NW | 0% |
| Saturday Night | 56°F | Clear | 1 to 12 mph NNE | 0% |
| Sunday | 92°F | Sunny | 1 to 12 mph NNW | 0% |
| Sunday Night | 53°F | Mostly Clear | 1 to 12 mph NE | 0% |
| Monday | 89°F | Sunny | 1 to 13 mph NNW | 0% |
| Monday Night | 50°F | Clear | 1 to 13 mph S | 0% |
Forecast source: National Weather Service (api.weather.gov) for McArthur (41.042, -121.405). Updated through the day.
Growing snapshot for McArthur
Last spring frost
May 29
First fall frost
Sep 19
Growing season
113 days
Hardiness zone
7b
More local growing data for McArthur: nearby ZIP 96028 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, Hat Creek, Ca (6.9 mi from McArthur). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.