Weather in Fullerton, CA
Updated 2026-09-26 09:45 local time · ZIP codes 92831, 92832, 92833, 92835
Sunny
No government weather alerts were returned for this location at the latest update.
Next hours
74°6% rain
79°5% rain80°3% rain80°3% rain80°3% rain80°2% rain80°2% rain
80°12% rain79°12% rain
77°14% rain77°14% rain77°14% rain3-day weather forecast
Weather details
Sunrise, sunset and moon
Key weather changes ahead
Today vs yesterday in Fullerton
Weather insights for today
Rain chance stays relatively low over the next 12 hours (up to 14%).
It feels like 77°F with winds near 3 mph.
77°F, 4% rain chance and 3 mph wind.
Visibility is around 6 mi; gusts may reach 21 mph.
Current temperature is 74°F, wind 3 mph, rain chance up to 14%.
UV index is 1.
Local weather characteristics in Fullerton
California weather varies from cool marine conditions along parts of the Pacific coast to hot inland valleys, deserts and snowy mountain climates. Short distances can produce large temperature differences.
Fullerton is part of the West weather region. The forecast point is near 33.87°N latitude and 117.92°W longitude. Local temperature, wind and precipitation can still differ from nearby places, especially where terrain, coastlines or urban development create small-scale weather changes.
Fullerton weather today
Sunny and 74°F in Fullerton, CA. Today's high is 80°F with a 10% rain chance. Winds are around 3 mph with gusts near 14 mph. Relative humidity is 69%, pressure is 29.88 inHg, and visibility is about 6 miles.
Tonight and tomorrow in Fullerton
Sunrise is at 06:42 AM and sunset is at 06:43 PM. Tomorrow's forecast calls for Overcast with a high near 80°F and a low near 71°F. The maximum rain chance is 10%.