Plymouth, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Plymouth, a city in Amador County, California.
Overnight
70°F
Clear
Clear, with a low around 70. East southeast wind around 2 mph.
7-day forecast for Plymouth
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 70°F | Clear | 2 mph ESE | 0% |
| Tuesday | 100°F | Sunny | 1 to 6 mph SW | 0% |
| Tuesday Night | 66°F | Clear | 1 to 6 mph SSE | 0% |
| Wednesday | 99°F | Sunny | 1 to 6 mph SW | 0% |
| Wednesday Night | 65°F | Clear | 1 to 6 mph S | 0% |
| Thursday | 99°F | Sunny | 1 to 6 mph SW | 0% |
| Thursday Night | 66°F | Clear | 1 to 6 mph SE | 0% |
| Friday | 99°F | Sunny | 1 to 6 mph SW | 0% |
| Friday Night | 67°F | Clear | 1 to 6 mph SE | 0% |
| Saturday | 100°F | Sunny | 1 to 6 mph NW | 0% |
| Saturday Night | 68°F | Mostly Clear | 2 to 6 mph SE | 0% |
| Sunday | 98°F | Sunny | 2 to 6 mph SW | 0% |
| Sunday Night | 65°F | Clear | 1 to 6 mph S | 0% |
| Monday | 93°F | Sunny | 1 to 7 mph SW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Plymouth (38.472, -120.857). Updated through the day.
Growing snapshot for Plymouth
Last spring frost
Mar 4
First fall frost
Dec 11
Growing season
285 days
Hardiness zone
9b
More local growing data for Plymouth: nearby ZIP 95699 weather · frost dates · planting calendar · California frost dates
Nearby towns & communities
Amador City
Buena Vista
Drytown
Fiddletown
Ione
Jackson
Lockwood
Martell
Mokelumne Hill
Paloma
Pine Grove
Pioneer
Red Corral
River Pines
Sutter Creek
Volcano
Climate data from the nearest NOAA station, Sutter Hill Cdf, Ca (5.1 mi from Plymouth). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.