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    • Today

      Sep 30

      58° /51°
      Low clouds, then sun and cool
      • Ragweed Pollen
        • Ragweed Pollen
        • Grass Pollen
        • Tree Pollen
        • Mold
        • Dust & Dander
        • Air Quality Index
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Low
      More
    • Sat

      Oct 1

      61° /51°F
      Cool with clouds, then sun
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Low
    • Sun

      Oct 2

      60° /49°
      A stray afternoon shower
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Low
      More
    • Mon

      Oct 3

      61° /52°
      Cool with some sun
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Low
      More
    • Tue

      Oct 4

      61° /51°
      Cool with clouds and sun
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Low
      More
    Saturday
    1am
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    8am
    Forecast Mostly Clear Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy Cloudy
    Temp (°F) 53° 52° 52° 52° 52° 51° 51° 53°
    RealFeel® 49° 48° 49° 49° 50° 49° 50° 52°
    Wind (mph) 8 NW 8 NW 8 NW 6 NW 6 NW 5 NW 5 NW 5 NW
    precip
    1am
    2am
    3am
    4am
    5am
    6am
    7am
    8am
    Rain
    0%
    0%
    0%
    0%
    0%
    0%
    0%
    0%
    Snow
    0%
    0%
    0%
    0%
    0%
    0%
    0%
    0%
    Ice
    0%
    0%
    0%
    0%
    0%
    0%
    0%
    0%
    SKY
    1am
    2am
    3am
    4am
    5am
    6am
    7am
    8am
    UV Index 0 0 0 0 0 0 0 0
    Cloud Cover 11% 95% 95% 95% 95% 95% 95% 95%
    Humidity 93% 96% 95% 95% 95% 97% 96% 98%
    Dew Point 51° 51° 51° 50° 50° 50° 50° 52°
    Temp °F
    1am
    2am
    3am
    4am
    5am
    6am
    7am
    8am
    55° 50°

    Temperature History

    more Historical Weather Data >
      Today Normal Record 10/1/2015
    High 61° 66° N/A 68°
    Low 51° 48° N/A 55°

    Sunrise/Sunset

    • Sunrise: 7:06 AM
    • Sunset: 6:52 PM
    • Duration: 11:46 hr

    Moonrise/Moonset

    • Moonrise: 7:40 AM
    • Moonset: 7:32 PM
    • Duration: 11:52 hr
    Astronomy

    Half Moon Bay Weather Report

    Cooler air, showers to aid in wildfire efforts across California this weekend

    September 30, 2016; 9:54 AM ET

    Improving weather over the next several days will aid officials in battling wildfires across California. More >

    Sat. Pollen

    Sat. Dust & Dander

    Sat. Wind Maps