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Fullerton Muni, CA Weather Forecast

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Clear

92°F

Updated	2:22 pm
Feels Like	80°F
Humidity	34%
Wind	NW 5 mph
Barometer	29.83 in
Dew Point	60°F

Clear

33°C

Updated	2:22 pm
Feels Like	27°C
Humidity	34%
Wind	NW 8 km/h
Barometer	101 kPa
Dew Point	16°C

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Cloud Cover	19%
uv UV Index	8
Sunrise	6:43 AM
Sunset	6:43 PM
Moonrise	6:38 PM
Moonset	6:41 AM

Civil Twilight
6:15 AM to 6:40 AM
6:43 PM to 7:07 PM
Fullerton Muni CA Weather - Waning Gibbous Moon

Waning Gibbous Moon

Fullerton Muni Weather Forecast

TONIGHT	SUNDAY	SUNDAY NIGHT	MONDAY	MONDAY NIGHT	TUESDAY	TUESDAY NIGHT	WEDNESDAY	WEDNESDAY NIGHT	THURSDAY	THURSDAY NIGHT	FRIDAY

Mostly Cloudy	Partly Cloudy	Partly Cloudy	Partly Cloudy	Mostly Clear	Mostly Sunny	Mostly Clear	Mostly Sunny	Mostly Clear	Partly Cloudy	Mostly Clear	Partly Cloudy
Lo: 69°FLo: 21°C	Hi: 86°FHi: 30°C	Lo: 66°FLo: 19°C	Hi: 81°FHi: 27°C	Lo: 62°FLo: 17°C	Hi: 88°FHi: 31°C	Lo: 69°FLo: 21°C	Hi: 91°FHi: 33°C	Lo: 68°FLo: 20°C	Hi: 90°FHi: 32°C	Lo: 68°FLo: 20°C	Hi: 90°FHi: 32°C

POP = Probability of Precipitation.

Weather Outlook Updated: 1257 PM PDT Sat Sep 26 2026 Fullerton Muni, CA Weather - WeatherWorld.com

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Issued: 1258 PM PDT Sat Sep 26 2026

Discussion

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

This afternoon...Temperatures are near or a few degrees higher than at this time yesterday. Today will likely be warmer than yesterday, with high temperatures anywhere from a few degrees above normal in the deserts to as much as 10-15 degrees above normal in the inland valleys of San Diego County. There were patchy marine layer low clouds this morning whic...

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Weather 101: Term of the Day

Tornado Watch

This is issued by the National Weather Service when conditions are favorable for the development of tornadoes in and close to the watch area. Their size can vary depending on the weather situation. They are usually issued for a duration of 4 to 8 hours. They normally are issued well in advance of the actual occurrence of severe weather. During the watch, people should review tornado safety rules and be prepared to move a place of safety if threatening weather approaches. A Tornado Watch is issued by the Storm Prediction Center (SPC) in Norman, Oklahoma. Prior to the issuance of a Tornado Watch, SPC will usually contact the affected local National Weather Forecast Office (NWFO) and they will discuss what their current thinking is on the weather situation. Afterwards, SPC will issue a preliminary Tornado Watch and then the affected NWFO will then adjust the watch (adding or eliminating counties/parishes) and then issue it to the public. After adjusting the watch, the NWFO will let the public know which counties are included by way of a Watch Redefining Statement. During the watch, the NWFO will keep the public informed on what is happening in the watch area and also let the public know when the watch has expired or been cancelled.