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Personalized Forecasts

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    • Today

      Sep 23

      58° /46°F
      Cooler with a touch of rain
      • 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
    • Sun

      Sep 24

      54° /42°
      Cool with periods of rain
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Low
      More
    • Mon

      Sep 25

      54° /40°
      Mostly cloudy, a little rain
      • Low
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Low
      • Tree Pollen: Low
      More
    • Tue

      Sep 26

      63° /44°
      Partly sunny and chilly
      • Moderate
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Moderate
      • Tree Pollen: Low
      More
    • Wed

      Sep 27

      67° /45°
      Intervals of clouds and sun
      • Moderate
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: Moderate
      • Tree Pollen: Low
      More

    Day

    58°Hi RealFeel® 61° Precipitation 60%
    Mostly cloudy and cooler with a bit of rain
    • Winds from the
    • ENE 6 mph
    • Gusts: 8 mph
    • Max UV Index: 4 (Moderate)
    • Thunderstorms: 24%
    • Precipitation: 0.1 in
    • Rain: 0.1 in
    • Snow: 0 in
    • Ice: 0 in
    • Hours of Precipitation: 2 hrs
    • Hours of Rain: 2 hrs

    Night

    46°Lo RealFeel® 42° Precipitation 68%
    Occasional rain and drizzle
    • Winds from the
    • NNE 6 mph
    • Gusts: 8 mph
    • Max UV Index: N/A
    • Thunderstorms: 24%
    • Precipitation: 0.3 in
    • Rain: 0.3 in
    • Snow: 0 in
    • Ice: 0 in
    • Hours of Precipitation: 4 hrs
    • Hours of Rain: 4 hrs

    Boulder Pollen Levels Sep 23

    • 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 9/23/2016
    High 58° 75° N/A 81°
    Low 46° 45° N/A 52°

    Sunrise/Sunset

    • Sunrise: 6:49 AM
    • Sunset: 6:57 PM
    • Duration: 12:08 hr

    Moonrise/Moonset

    • Moonrise: 10:10 AM
    • Moonset: 9:12 PM
    • Duration: 11:02 hr
    Astronomy

    Sat. Pollen

    Sat. Dust & Dander

    Sat. Wind Maps