McArthur, CA Weather & Growing Conditions
This Afternoon
75°F
Sunny
Sunny, with a high near 75. North wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 75°F | Sunny | 5 mph N | 0% |
| Tonight | 44°F | Clear | 0 to 5 mph NE | 0% |
| Saturday | 80°F | Sunny | 0 to 5 mph N | 0% |
| Saturday Night | 46°F | Mostly Clear | 0 to 5 mph NE | 0% |
| Sunday | 85°F | Mostly Sunny | 0 to 5 mph N | 0% |
| Sunday Night | 49°F | Partly Cloudy | 0 to 5 mph SW | 0% |
| Monday | 84°F | Mostly Sunny | 0 to 5 mph N | 0% |
| Monday Night | 49°F | Mostly Clear | 0 to 5 mph N | 0% |
| Tuesday | 84°F | Sunny | 0 to 5 mph N | 0% |
| Tuesday Night | 48°F | Mostly Clear | 0 to 5 mph NE | 0% |
| Wednesday | 84°F | Sunny | 0 to 10 mph NW | 0% |
| Wednesday Night | 48°F | Mostly Clear | 0 to 10 mph SE | 0% |
| Thursday | 84°F | Sunny | 0 to 10 mph SW | 0% |
| Thursday Night | 50°F | Partly Cloudy | 0 to 10 mph S | 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 Sep 19, 2026.