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    • Early AM

      Sep 25

      40° Lo
      Increasing clouds
      • Ragweed Pollen
        • Ragweed Pollen
        • Grass Pollen
        • Tree Pollen
        • Mold
        • Dust & Dander
        • Air Quality Index
      • Ragweed Pollen
      • Weather
      • Grass Pollen: Low
      • Ragweed Pollen: High
      • Tree Pollen: Low
      More
    • Today

      Sep 25

      67° /39°
      Mostly sunny
      • High
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: High
      • Tree Pollen: Low
      More
    • Mon

      Sep 26

      75° /44°F
      Sunny and warmer
      • High
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: High
      • Tree Pollen: Low
    • Tue

      Sep 27

      82° /44°
      Nice with plenty of sunshine
      • High
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: High
      • Tree Pollen: Low
      More
    • Wed

      Sep 28

      81° /47°
      Partly sunny
      • High
      • ragweed pollen levels
      • Grass Pollen: Low
      • Ragweed Pollen: High
      • Tree Pollen: Low
      More

    Day

    75°Hi RealFeel® 80° Precipitation 4%
    Warmer with plenty of sunshine
    • ESE 5 mph
    • Gusts: 8 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

    44°Lo RealFeel® 44° Precipitation 1%
    Clear
    • W 4 mph
    • Gusts: 6 mph
    • Max UV Index: N/A
    • Thunderstorms: 1%
    • Precipitation: 0 in
    • Rain: 0 in
    • Snow: 0 in
    • Ice: 0 in
    • Hours of Precipitation: 0 hrs
    • Hours of Rain: 0 hrs

    Boulder Pollen Levels Sep 26

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

      Low

    • Ragweed Pollen

      High

    • Mold

      High

    • Grass Pollen

      Low

    Temperature History

    more Historical Weather Data >
      Today Normal Record 9/26/2015
    High 75° 73° N/A 86°
    Low 44° 44° N/A 48°

    Sunrise/Sunset

    • Sunrise: 6:53 AM
    • Sunset: 6:50 PM
    • Duration: 11:57 hr

    Moonrise/Moonset

    • Moonrise: 2:35 AM
    • Moonset: 4:40 PM
    • Duration: 14:05 hr
    Astronomy

    Mon. Pollen

    Mon. Dust & Dander

    Mon. Wind Maps