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    • Tonight

      Jan 17

      47° Lo F
      A passing shower or two late
      • 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: Low
    • Wed

      Jan 18

      57° /50°
      Cloudy, rain becoming heavier
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Low
      More
    • Thu

      Jan 19

      58° /50°
      Mostly cloudy with a shower
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Low
      More
    • Fri

      Jan 20

      56° /47°
      Cloudy with showers
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Low
      More
    • Sat

      Jan 21

      57° /51°
      Periods of clouds and sun
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Low
      More

    Day

    55°Hi RealFeel® 58° Precipitation 3%
    Periods of clouds and sun
    • NW 4 mph
    • Gusts: 9 mph
    • Max UV Index: 2 (Low)
    • Thunderstorms: 0%
    • Precipitation: 0 in
    • Rain: 0 in
    • Snow: 0 in
    • Ice: 0 in
    • Hours of Precipitation: 0 hrs
    • Hours of Rain: 0 hrs

    Night

    47°Lo RealFeel® 44° Precipitation 55%
    Mostly cloudy with a passing shower or two late
    • S 5 mph
    • Gusts: 9 mph
    • Max UV Index: N/A
    • Thunderstorms: 20%
    • Precipitation: 0.02 in
    • Rain: 0.02 in
    • Snow: 0 in
    • Ice: 0 in
    • Hours of Precipitation: 1 hrs
    • Hours of Rain: 1 hrs

    San Mateo Pollen Levels Jan 17

    • Extreme
    • Very High
    • High
    • Moderate
    • Low
    • Tree Pollen

      Low

    • Ragweed Pollen

      Low

    • Mold

      Low

    • Grass Pollen

      Low

    Temperature History

    more Historical Weather Data >
      Today Normal Record 1/17/2016
    High 55° 58° N/A 61°
    Low 47° 42° N/A 54°

    Sunrise/Sunset

    • Sunrise: 7:22 AM
    • Sunset: 5:17 PM
    • Duration: 9:55 hr

    Moonrise/Moonset

    • Moonrise: 11:05 PM
    • Moonset: 11:11 AM
    • Duration: 12:06 hr
    Astronomy

    Tue. Pollen

    Tue. Dust & Dander

    Tue. Wind Maps