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
54°F
Light Rain
Rain and patchy fog. Cloudy, with a high near 54. Northeast wind around 6 mph. Chance of precipitation is 100%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Spring Valley
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 54°F | Light Rain | 6 mph NE | 99% |
| Tonight | 40°F | Chance Light Rain then Mostly Cloudy | 8 mph NNE | 47% |
| Wednesday | 66°F | Mostly Sunny | 2 to 6 mph NW | 0% |
| Wednesday Night | 43°F | Partly Cloudy | 0 to 3 mph NW | 0% |
| Thursday | 71°F | Sunny | 2 mph NNW | 0% |
| Thursday Night | 46°F | Mostly Clear | 2 mph NW | 0% |
| Friday | 74°F | Sunny | 2 mph NW | 0% |
| Friday Night | 50°F | Mostly Clear | 1 mph NNW | 0% |
| Saturday | 74°F | Sunny | 0 to 3 mph E | 0% |
| Saturday Night | 48°F | Partly Cloudy | 2 mph ENE | 0% |
| Sunday | 73°F | Mostly Sunny | 2 mph W | 0% |
| Sunday Night | 48°F | Partly Cloudy | 2 mph WNW | 1% |
| Monday | 70°F | Partly Sunny | 0 to 3 mph WSW | 2% |
| Monday Night | 46°F | Partly Cloudy | 0 to 3 mph WSW | 4% |
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 Nov 3, 2026.