Fountain Valley, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fountain Valley, a city in Orange County, California.
Today
80°F
Sunny
Sunny, with a high near 80. Southwest wind 0 to 10 mph.
7-day forecast for Fountain Valley
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 80°F | Sunny | 0 to 10 mph SW | 0% |
| Tonight | 68°F | Partly Cloudy | 0 to 5 mph SW | 0% |
| Wednesday | 80°F | Mostly Sunny | 0 to 10 mph SW | 0% |
| Wednesday Night | 68°F | Partly Cloudy | 0 to 5 mph SW | 0% |
| Thursday | 81°F | Mostly Sunny | 0 to 10 mph SW | 0% |
| Thursday Night | 69°F | Partly Cloudy | 0 to 10 mph S | 0% |
| Friday | 80°F | Mostly Sunny | 0 to 10 mph S | 0% |
| Friday Night | 69°F | Partly Cloudy | 0 to 10 mph S | 0% |
| Saturday | 83°F | Sunny | 0 to 10 mph S | 0% |
| Saturday Night | 69°F | Partly Cloudy | 0 to 10 mph S | 0% |
| Sunday | 82°F | Mostly Sunny | 0 to 10 mph S | 0% |
| Sunday Night | 69°F | Partly Cloudy | 5 to 10 mph S | 1% |
| Monday | 81°F | Mostly Sunny | 5 to 10 mph S | 1% |
| Monday Night | 68°F | Partly Cloudy | 5 to 10 mph S | 1% |
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
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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 Aug 4, 2026.