Jamestown, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Jamestown, a community in Tuolumne County, California.
This Afternoon
80°F
Sunny
Sunny, with a high near 80. West northwest wind around 8 mph, with gusts as high as 18 mph.
7-day forecast for Jamestown
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 80°F | Sunny | 8 mph WNW | 0% |
| Tonight | 59°F | Clear | 2 to 7 mph N | 0% |
| Saturday | 84°F | Sunny | 5 mph SW | 0% |
| Saturday Night | 63°F | Partly Cloudy | 5 mph NNE | 0% |
| Sunday | 84°F | Partly Sunny | 6 mph WNW | 0% |
| Sunday Night | 64°F | Mostly Cloudy | 2 to 6 mph N | 0% |
| Monday | 84°F | Sunny | 2 to 7 mph W | 0% |
| Monday Night | 63°F | Mostly Clear | 2 to 7 mph NNE | 0% |
| Tuesday | 86°F | Sunny | 2 to 6 mph W | 0% |
| Tuesday Night | 64°F | Clear | 6 mph NNE | 0% |
| Wednesday | 91°F | Sunny | 6 mph W | 0% |
| Wednesday Night | 67°F | Mostly Clear | 7 mph NNE | 0% |
| Thursday | 94°F | Sunny | 3 to 7 mph SW | 0% |
| Thursday Night | 69°F | Mostly Clear | 8 mph NNE | 0% |
Forecast source: National Weather Service (api.weather.gov) for Jamestown (37.958, -120.407). Updated through the day.
Growing snapshot for Jamestown
Last spring frost
Apr 9
First fall frost
Nov 9
Growing season
213 days
Hardiness zone
9a
More local growing data for Jamestown: nearby ZIP 95370 weather · frost dates · planting calendar · California frost dates
Nearby towns & communities
Cedar Ridge
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Cold Springs
East Sonora
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Long Barn
Mi-Wuk Village
Mono Vista
Phoenix Lake
Pine Mountain Lake
Sierra Village
Sonora
Soulsbyville
Strawberry
Tuolumne City
Twain Harte
Climate data from the nearest NOAA station, Sonora, Ca (2.4 mi from Jamestown). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.