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    • Early AM

      Apr 30

      51° Lo
      Mainly 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: High
      More
    • Today

      Apr 30

      71° /52°
      Mostly sunny and pleasant
      • Low
      • ragweed pollen levels
      • Grass Pollen: Moderate
      • Ragweed Pollen: Low
      • Tree Pollen: Low
      More
    • Mon

      May 1

      74° /54°F
      Low clouds, then sunshine
      • Low
      • ragweed pollen levels
      • Grass Pollen: Moderate
      • Ragweed Pollen: Low
      • Tree Pollen: High
    • Tue

      May 2

      76° /55°
      Low clouds, then sunshine
      • Low
      • ragweed pollen levels
      • Grass Pollen: Moderate
      • Ragweed Pollen: Low
      • Tree Pollen: High
      More
    • Wed

      May 3

      79° /56°
      Sunny and very warm
      • Low
      • ragweed pollen levels
      • Grass Pollen: Moderate
      • Ragweed Pollen: Low
      • Tree Pollen: High
      More

    Day

    74°Hi RealFeel® 78° Precipitation 0%
    Low clouds giving way to sunshine
    • WNW 9 mph
    • Gusts: 18 mph
    • Max UV Index: 8 (Very High)
    • 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

    54°Lo RealFeel® 53° Precipitation 0%
    Clear in the evening followed by low clouds
    • W 8 mph
    • Gusts: 17 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

    San Bruno Pollen Levels May 1

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

      High

    • Ragweed Pollen

      Low

    • Mold

      Low

    • Grass Pollen

      Moderate

    Temperature History

    more Historical Weather Data >
      Today Normal Record 5/1/2016
    High 74° 66° 89° (1947) 80°
    Low 54° 50° 44° (2008) 54°

    Sunrise/Sunset

    • Sunrise: 6:14 AM
    • Sunset: 8:00 PM
    • Duration: 13:46 hr

    Moonrise/Moonset

    • Moonrise: 11:14 AM
    • Moonset: 1:40 AM
    • Duration: 14:26 hr
    Astronomy

    Mon. Pollen

    Mon. Dust & Dander

    Mon. Wind Maps