Weather Alert
Fullerton Weather Warning NWS WEATHER ALERT FOR THE FULLERTON, CA AREA - WIND ADVISORY Issued: 1203 PM PDT Sat Oct 3 2026 Fullerton Weather Warning

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Fullerton, CA Weather Forecast

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Fullerton, CA Weather Forecast

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Fullerton CA weather - Clear - 102°F
Clear
102°F
Updated 3:50 pm
Feels Like 85°F
Humidity 18%
Wind SW 8 mph
Barometer  29.73 in
Dew Point 51°F
Fullerton CA weather - Clear - 39°C
Clear
39°C
Updated 3:50 pm
Feels Like 30°C
Humidity 18%
Wind SW 13 km/h
Barometer  100.7 kPa
Dew Point 11°C
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Fullerton Weather Forecast

TONIGHT SUNDAY SUNDAY NIGHT MONDAY MONDAY NIGHT TUESDAY TUESDAY NIGHT WEDNESDAY WEDNESDAY NIGHT THURSDAY THURSDAY NIGHT FRIDAY
Fullerton, CA Weather - Tonight Clear Fullerton, CA Weather - Sunday Mostly Sunny Fullerton, CA Weather - Sunday Night Mostly Clear Fullerton, CA Weather - Monday Mostly Sunny Fullerton, CA Weather - Monday Night Mostly Clear Fullerton, CA Weather - Tuesday Mostly Sunny Fullerton, CA Weather - Tuesday Night Clear Fullerton, CA Weather - Wednesday Mostly Sunny Fullerton, CA Weather - Wednesday Night Clear Fullerton, CA Weather - Thursday Mostly Sunny Fullerton, CA Weather - Thursday Night Clear Fullerton, CA Weather - Friday Mostly Sunny
Clear Mostly Sunny Mostly Clear Mostly Sunny Mostly Clear Mostly Sunny Clear Mostly Sunny Clear Mostly Sunny Clear Mostly Sunny
Lo: 74°FLo: 23°C Hi: 102°FHi: 39°C
 Lo: 75°FLo: 24°C Hi: 100°FHi: 38°C
 Lo: 73°FLo: 23°C Hi: 98°FHi: 37°C
 Lo: 74°FLo: 23°C Hi: 97°FHi: 36°C
 Lo: 72°FLo: 22°C Hi: 94°FHi: 34°C
 Lo: 71°FLo: 22°C Hi: 90°FHi: 32°C
POP = Probability of Precipitation.
Weather Outlook Updated: 1133 AM PDT Sat Oct 03 2026 Fullerton, CA Weather - WeatherWorld.com

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Issued: 1137 AM PDT Sat Oct 3 2026

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...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE... SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO COUNTIES...

Santa Ana winds have been observed this morning. East flow around an area of high pressure has resulted in gusts near 30-45 MPH across the San Diego County mts/foothills. Gusty winds and lower relative humidity each day will lead to elevated to near-critical fire weather conditions, so make sure to do your part that leads to one less spark! East winds have...