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    • Tonight

      Sep 24

      53° Lo
      Clear
      • Ragweed Pollen
        • Ragweed Pollen
        • Grass Pollen
        • Tree Pollen
        • Mold
        • Dust & Dander
        • Air Quality Index
      • Ragweed Pollen
      • Weather
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Moderate
      More
    • Sun

      Sep 25

      80° /56°
      Warmer with plenty of sun
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Moderate
      More
    • Mon

      Sep 26

      81° /55°F
      Very warm with plenty of sun
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Moderate
    • Tue

      Sep 27

      70° /53°
      Areas of fog, then sun
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Moderate
      More
    • Wed

      Sep 28

      63° /52°
      Low clouds, then sunshine
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Low
      More

    Day

    81°Hi RealFeel® 84° Precipitation 1%
    Very warm with plenty of sun
    • WNW 5 mph
    • Gusts: 9 mph
    • Max UV Index: 6 (High)
    • Thunderstorms: 1%
    • Precipitation: 0 in
    • Rain: 0 in
    • Snow: 0 in
    • Ice: 0 in
    • Hours of Precipitation: 0 hrs
    • Hours of Rain: 0 hrs

    Night

    55°Lo RealFeel® 57° Precipitation 1%
    Clear in the evening followed by low clouds
    • 0 mph
    • Gusts: 5 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 9/26/2015
    High 81° 66° N/A 64°
    Low 55° 49° N/A 52°

    Sunrise/Sunset

    • Sunrise: 7:02 AM
    • Sunset: 6:59 PM
    • Duration: 11:57 hr

    Moonrise/Moonset

    • Moonrise: 2:51 AM
    • Moonset: 4:46 PM
    • Duration: 13:55 hr
    Astronomy

    Half Moon Bay Weather Report

    Northern California towns in danger of running out of water for 3rd year in a row

    September 24, 2016; 11:51 AM ET

    For the third year in a row, some communities in northern California may run out of water due to the extreme drought conditions gripping the state. More >

    Mon. Dust & Dander

    Mon. Wind Maps