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      Elev 5555 ft, 40.059 °N 105.281 °W

      Boulder, CO

      BoulderCAST Station Station80°
      Updated: 11:09 AM MDT on September 8, 2026 (GMT -6)
      5 minutes ago
      82°
      60°
      80
      Feels Like 80
      Sunny
      N
      7
      Lower temperature is expected today
      50
      50
      575
      90
      50
      7
      0 mph
      50
      50
      50
      50
      50
      50
      Radar · Now
        Hyper-local data from Weather Underground's network of
        400,000+ personal weather stations worldwide
        Today
        Wed 09/09
        High 82°f
         15% Precip. / 0 in
        A mix of clouds and sun. A stray shower or thunderstorm is possible. High 82F. Winds SE at 5 to 10 mph.
        Tonight
        Wed 09/09
        Low 57°f
         15% Precip. / 0 in
        Some passing clouds. A stray shower or thunderstorm is possible. Low 57F. Winds light and variable.
        Tomorrow
        Thu 09/10
        High 81°f55°f
         15% Precip. / 0 in
        Generally sunny despite a few afternoon clouds. A stray shower or thunderstorm is possible. High 81F. Winds ESE at 5 to 10 mph.
        Hourly Forecast
        Now
        78°
        12PM
        80°
        1PM
        81°
        2PM
        81°
        3PM
        80°
        4PM
        80°
        5PM
        79°
        6PM
        77°
        7PM
        75°
        7:21PM
        Sunset
        8PM
        72°
        9PM
        69°
        10PM
        67°
        11PM
        66°
        12AM
        66°
        1AM
        65°
        2AM
        65°
        3AM
        63°
        4AM
        62°
        5AM
        60°
        6AM
        59°
        6:36AM
        Sunrise
        7AM
        58°
        8AM
        62°
        9AM
        64°
        10AM
        66°
        11AM
        70°
        Precipitation
        15%
        Pollen
        Grass Pollen
        Low
        Air Quality
        17
        Good
        UV Index
        6
        High
        Additional Conditions
        1. Pressure 29.96 in
        2. Visibility 10 miles
        3. Clouds Partly Cloudy
        4. Dew Point51°F
        5. Humidity 38%
        6. Rainfall 0.04 in
        7. Snow Depth 0 in
         KBDU Station History
        Almanac for September 8, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 82°F 82°F 97°F 2022
        4. Low 60°F 51°F 32°F 2020
        5. Rain/Snow Depth
        6. Precipitation 0 in 3.5 in -
        7. Snow 0 in 0 in -
        Almanac for September 9, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 81°F 82°F 95°F
        4. Low 60°F 51°F 30°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 6:35 AM 7:21 PM
        3. Civil Twilight 6:08 AM 7:48 PM
        4. Nautical Twilight 5:35 AM 8:20PM
        5. Astronomical Twilight 5:01 AM 8:54 PM
        1. Length of Visible Light 13h 40m
        2. Length of Day 12h 45m
        3. Tomorrow will be 2 minutes 34 seconds shorter
        1. Moon 3:34 AM 6:10 PM
        2. Waning Crescent9% of the Moon is Illuminated
        Sep 10
        New Moon
        Sep 18
        Waxing Half First Qtr
        Sep 26
        Full Moon
        Oct 3
        Waning Half Last Qtr
        Precipitation
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