Spring Valley, CA Weather & Growing Conditions
This Afternoon
54°F
Light Rain
Rain. Mostly cloudy, with a high near 54. East northeast wind around 8 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 54°F | Light Rain | 8 mph ENE | 83% |
| Tonight | 44°F | Chance Light Rain then Patchy Fog | 1 to 8 mph NE | 39% |
| Wednesday | 65°F | Patchy Fog then Partly Sunny | 0 to 7 mph WSW | 0% |
| Wednesday Night | 43°F | Partly Cloudy | 1 to 6 mph W | 0% |
| Thursday | 70°F | Sunny | 0 to 3 mph SW | 0% |
| Thursday Night | 48°F | Mostly Clear | 2 mph WNW | 0% |
| Friday | 74°F | Sunny | 2 mph N | 0% |
| Friday Night | 51°F | Mostly Clear | 2 mph NW | 0% |
| Saturday | 74°F | Sunny | 0 to 5 mph ESE | 0% |
| Saturday Night | 49°F | Mostly Clear | 0 to 3 mph W | 0% |
| Sunday | 72°F | Mostly Sunny | 0 to 3 mph WNW | 0% |
| Sunday Night | 49°F | Mostly Cloudy | 0 to 3 mph WNW | 0% |
| Monday | 69°F | Mostly Sunny | 0 to 5 mph W | 3% |
| Monday Night | 47°F | Partly Cloudy | 0 to 3 mph WNW | 3% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Spring Valley, CA
Last spring frost
Apr 10
First fall frost
Nov 6
Growing season
209 days
Hardiness zone
9a
Explore more for Spring Valley, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Clearlake 4 Se, Ca (10.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.