Plymouth, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Plymouth, a city in Amador County, California.
This Afternoon
82°F
Sunny
Sunny, with a high near 82. West northwest wind around 7 mph.
7-day forecast for Plymouth
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 82°F | Sunny | 7 mph WNW | 0% |
| Tonight | 55°F | Clear | 1 to 5 mph ENE | 0% |
| Saturday | 86°F | Sunny | 5 mph SW | 0% |
| Saturday Night | 59°F | Partly Cloudy | 3 mph ESE | 0% |
| Sunday | 84°F | Partly Sunny | 5 mph SSW | 0% |
| Sunday Night | 56°F | Mostly Cloudy | 3 mph S | 0% |
| Monday | 85°F | Sunny | 1 to 5 mph SSW | 0% |
| Monday Night | 57°F | Mostly Clear | 1 to 5 mph SSE | 0% |
| Tuesday | 86°F | Sunny | 1 to 5 mph S | 0% |
| Tuesday Night | 61°F | Clear | 0 to 5 mph NE | 0% |
| Wednesday | 92°F | Sunny | 2 to 6 mph W | 0% |
| Wednesday Night | 64°F | Mostly Clear | 2 to 7 mph NE | 0% |
| Thursday | 95°F | Sunny | 6 mph SW | 0% |
| Thursday Night | 65°F | Mostly Clear | 5 mph SSE | 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 Sep 19, 2026.