Fountain Valley, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fountain Valley, a city in Orange County, California.
Tonight
57°F
Mostly Clear
Mostly clear, with a low around 57. East wind 5 to 10 mph.
7-day forecast for Fountain Valley
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 57°F | Mostly Clear | 5 to 10 mph E | 0% |
| Wednesday | 75°F | Sunny | 0 to 5 mph NE | 0% |
| Wednesday Night | 58°F | Mostly Clear | 0 to 5 mph N | 0% |
| Thursday | 80°F | Sunny | 0 to 5 mph SW | 0% |
| Thursday Night | 59°F | Mostly Clear | 0 to 5 mph NW | 0% |
| Friday | 84°F | Sunny | 0 to 10 mph NW | 0% |
| Friday Night | 63°F | Clear | 5 to 10 mph N | 0% |
| Saturday | 87°F | Sunny | 0 to 5 mph N | 0% |
| Saturday Night | 65°F | Mostly Clear | 5 to 10 mph N | 0% |
| Sunday | 86°F | Sunny | 0 to 5 mph N | 0% |
| Sunday Night | 65°F | Partly Cloudy | 0 to 5 mph N | 0% |
| Monday | 83°F | Mostly Sunny | 0 to 5 mph SE | 0% |
| Monday Night | 64°F | Partly Cloudy | 0 to 5 mph SE | 1% |
| Tuesday | 81°F | Mostly Sunny | 0 to 5 mph SW | 2% |
Forecast source: National Weather Service (api.weather.gov) for Fountain Valley (33.711, -117.951). Updated through the day.
Growing snapshot for Fountain Valley
Growing season
365 days
Hardiness zone
10b
More local growing data for Fountain Valley: nearby ZIP 92708 weather · frost dates · planting calendar · California frost dates
Nearby towns & communities
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Climate data from the nearest NOAA station, Santa Ana John Wayne Ap, Ca (5.3 mi from Fountain Valley). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.