Arnold, CA Weather & Growing Conditions
Tonight
37°F
Mostly Clear
Mostly clear. Low around 37, with temperatures rising to around 39 overnight. East northeast wind around 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 37°F | Mostly Clear | 6 mph ENE | 1% |
| Wednesday | 56°F | Patchy Frost then Sunny | 1 to 7 mph WNW | 1% |
| Wednesday Night | 41°F | Mostly Cloudy | 5 mph NE | 1% |
| Thursday | 60°F | Mostly Sunny | 1 to 5 mph N | 0% |
| Thursday Night | 42°F | Clear | 1 to 7 mph N | 0% |
| Friday | 64°F | Sunny | 0 to 6 mph S | 0% |
| Friday Night | 46°F | Mostly Clear | 0 to 7 mph E | 0% |
| Saturday | 67°F | Sunny | 0 to 6 mph S | 0% |
| Saturday Night | 45°F | Mostly Clear | 0 to 6 mph E | 0% |
| Sunday | 66°F | Sunny | 0 to 6 mph SSW | 0% |
| Sunday Night | 47°F | Partly Cloudy | 0 to 6 mph E | 0% |
| Monday | 64°F | Mostly Sunny | 0 to 5 mph SSE | 0% |
| Monday Night | 46°F | Partly Cloudy | 0 to 5 mph E | 1% |
| Tuesday | 64°F | Sunny | 0 to 3 mph SSE | 4% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Arnold, CA
Last spring frost
May 7
First fall frost
Oct 28
Growing season
169 days
Hardiness zone
8b
Explore more for Arnold, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Calaveras Big Trees, Ca (3.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.