Fullerton, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fullerton, a city in Orange County, California.
This Afternoon
80°F
Sunny
Sunny, with a high near 80. Southwest wind around 10 mph.
7-day forecast for Fullerton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 80°F | Sunny | 10 mph SW | 0% |
| Tonight | 64°F | Mostly Clear | 0 to 5 mph S | 1% |
| Saturday | 83°F | Sunny | 0 to 10 mph S | 1% |
| Saturday Night | 65°F | Mostly Cloudy | 0 to 5 mph S | 0% |
| Sunday | 80°F | Partly Sunny | 0 to 10 mph S | 0% |
| Sunday Night | 65°F | Mostly Cloudy | 0 to 5 mph S | 1% |
| Monday | 79°F | Mostly Sunny | 5 to 10 mph S | 0% |
| Monday Night | 64°F | Mostly Clear | 0 to 10 mph S | 1% |
| Tuesday | 81°F | Sunny | 0 to 10 mph S | 0% |
| Tuesday Night | 65°F | Mostly Clear | 0 to 10 mph W | 0% |
| Wednesday | 87°F | Sunny | 0 to 10 mph SW | 0% |
| Wednesday Night | 67°F | Mostly Clear | 0 to 10 mph SW | 3% |
| Thursday | 88°F | Sunny | 0 to 5 mph SW | 1% |
| Thursday Night | 69°F | Mostly Clear | 0 to 5 mph SW | 1% |
Forecast source: National Weather Service (api.weather.gov) for Fullerton (33.886, -117.928). Updated through the day.
Growing snapshot for Fullerton
Growing season
365 days
Hardiness zone
10b
More local growing data for Fullerton: nearby ZIP 92832 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, Fullerton Muni Ap, Ca (2.9 mi from Fullerton). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.