Plymouth, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Plymouth, a city in Amador County, California.
This Afternoon
62°F
Light Rain
Rain. Mostly cloudy. High near 62, with temperatures falling to around 57 in the afternoon. Southeast wind around 5 mph. Chance of precipitation is 80%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Plymouth
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 62°F | Light Rain | 5 mph SE | 75% |
| Tonight | 44°F | Partly Cloudy | 5 mph ENE | 12% |
| Wednesday | 64°F | Sunny | 3 to 7 mph NNW | 0% |
| Wednesday Night | 45°F | Partly Cloudy | 5 mph NE | 0% |
| Thursday | 67°F | Sunny | 5 mph WNW | 0% |
| Thursday Night | 45°F | Clear | 5 mph NE | 0% |
| Friday | 69°F | Sunny | 3 mph N | 0% |
| Friday Night | 49°F | Clear | 2 to 6 mph N | 0% |
| Saturday | 73°F | Sunny | 1 to 5 mph WSW | 0% |
| Saturday Night | 50°F | Mostly Clear | 1 to 6 mph N | 0% |
| Sunday | 73°F | Sunny | 1 to 5 mph W | 0% |
| Sunday Night | 52°F | Partly Cloudy | 5 mph ENE | 0% |
| Monday | 71°F | Mostly Sunny | 3 mph SSW | 1% |
| Monday Night | 51°F | Partly Cloudy | 3 mph ENE | 1% |
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 Nov 4, 2026.