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Personalized Forecasts

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    • Today

      Sep 25

      99° /68°F
      Abundant sunshine
      • Beneficial
      • weather for asthma
      • Hi RealFeel: 104°
      • UV: 5 - High
      • Air Qual.: Moderate
    • Mon

      Sep 26

      103° /71°
      Very hot
      • Beneficial
      • weather for asthma
      • Hi RealFeel: 108°
      • UV: 5 - High
      • Air Qual.: Moderate
      More
    • Tue

      Sep 27

      92° /69°
      Partly sunny and hot
      • Beneficial
      • weather for asthma
      • Hi RealFeel: 96°
      • UV: 5 - High
      • Air Qual.: Moderate
      More
    • Wed

      Sep 28

      90° /67°
      Sunny and very warm
      • Beneficial
      • weather for asthma
      • Hi RealFeel: 93°
      • UV: 5 - High
      • Air Qual.: Moderate
      More
    • Thu

      Sep 29

      89° /66°
      Warm with plenty of sunshine
      • Beneficial
      • weather for asthma
      • Hi RealFeel: 93°
      • UV: 5 - High
      • Air Qual.: Good
      More

    Day

    99°Hi RealFeel® 104° Precipitation 3%
    Abundant sunshine; excessive dry weather will result in a high fire threat
    • ESE 2 mph
    • Gusts: 13 mph
    • Max UV Index: 7 (High)
    • Thunderstorms: 3%
    • Precipitation: 0 in
    • Rain: 0 in
    • Snow: 0 in
    • Ice: 0 in
    • Hours of Precipitation: 0 hrs
    • Hours of Rain: 0 hrs

    Night

    68°Lo RealFeel® 64° Precipitation 5%
    Clear and breezy
    • ENE 14 mph
    • Gusts: 23 mph
    • Max UV Index: N/A
    • Thunderstorms: 0%
    • Precipitation: 0 in
    • Rain: 0 in
    • Snow: 0 in
    • Ice: 0 in
    • Hours of Precipitation: 0 hrs
    • Hours of Rain: 0 hrs

    Temperature History

    more Historical Weather Data >
      Today Normal Record 9/25/2015
    High 99° 82° 98° (2010) 94°
    Low 68° 62° 57° (2005) 70°

    Sunrise/Sunset

    • Sunrise: 6:42 AM
    • Sunset: 6:43 PM
    • Duration: 12:01 hr

    Moonrise/Moonset

    • Moonrise: 1:41 AM
    • Moonset: 3:40 PM
    • Duration: 13:59 hr
    Astronomy

    Fullerton Weather Report

    Santa Ana winds to raise wildfire threat across Southern California into Monday

    September 25, 2016; 12:47 PM ET

    Hot, dry and windy weather into Monday will lead to an increased risk of wildfires across Southern California. More >

    Sun. Air Quality

    Sun. Asthma Risk

    Sun. UV Index