Spring Valley, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Spring Valley, a community in Lake County, California.
Today
103°F
Sunny
Sunny, with a high near 103. Northeast wind 2 to 10 mph.
7-day forecast for Spring Valley
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 103°F | Sunny | 2 to 10 mph NE | 0% |
| Tonight | 69°F | Mostly Clear | 0 to 10 mph NW | 0% |
| Wednesday | 101°F | Sunny | 0 to 9 mph ESE | 0% |
| Wednesday Night | 67°F | Clear | 0 to 8 mph WSW | 0% |
| Thursday | 101°F | Sunny | 0 to 8 mph E | 0% |
| Thursday Night | 68°F | Mostly Clear | 0 to 8 mph W | 0% |
| Friday | 102°F | Sunny | 0 to 9 mph ENE | 0% |
| Friday Night | 70°F | Clear | 1 to 9 mph W | 0% |
| Saturday | 103°F | Sunny | 1 to 10 mph N | 0% |
| Saturday Night | 69°F | Clear | 3 to 10 mph WNW | 0% |
| Sunday | 100°F | Sunny | 3 to 10 mph NE | 0% |
| Sunday Night | 65°F | Clear | 2 to 10 mph W | 0% |
| Monday | 96°F | Sunny | 2 to 9 mph E | 0% |
| Monday Night | 62°F | Mostly Clear | 1 to 9 mph W | 0% |
Forecast source: National Weather Service (api.weather.gov) for Spring Valley (39.076, -122.585). Updated through the day.
Growing snapshot for Spring Valley
Last spring frost
Apr 10
First fall frost
Nov 6
Growing season
209 days
Hardiness zone
9a
More local growing data for Spring Valley: nearby ZIP 95423 weather · frost dates · planting calendar · California frost dates
Nearby towns & communities
Clearlake
Clearlake Oaks
Clearlake Riviera
Cobb
Hidden Valley Lake
Kelseyville
Lakeport
Lower Lake
Lucerne
Middletown
Nice
North Lakeport
Soda Bay
Upper Lake
Climate data from the nearest NOAA station, Clearlake 4 Se, Ca (10.5 mi from Spring Valley). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.