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      Elev 217 ft, 39.007 °N 76.877 °W

      Greenbelt, MD

      Greenbelt Station77°
      Updated: 2:42 PM EDT on September 17, 2026 (GMT -4)
      8 minutes ago
      90°
      67°
      77
      Feels Like 79
      Light Rain
      N
      6
      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
        Thu 09/17
        High 82°f
         74% Precip. / 0 in
        Cloudy with occasional light rain throughout the day. High 82F. Winds SW at 5 to 10 mph. Chance of rain 70%.
        Tonight
        Thu 09/17
        Low 71°f
         56% Precip. / 0.04 in
        Scattered thunderstorms early, then partly cloudy after midnight. Low 71F. Winds light and variable. Chance of rain 60%.
        Tomorrow
        Fri 09/18
        High 86°f64°f
         15% Precip. / 0 in
        Partly cloudy skies in the morning will give way to cloudy skies during the afternoon. Slight chance of a rain shower. High 86F. Winds N at 5 to 10 mph.
        Hourly Forecast
        Now
        77°
        3PM
        74%
        78°
        4PM
        81°
        5PM
        78°
        6PM
        80°
        7PM
        80°
        7:12PM
        Sunset
        8PM
        56%
        78°
        9PM
        40%
        76°
        10PM
        41%
        76°
        11PM
        74°
        12AM
        74°
        1AM
        73°
        2AM
        73°
        3AM
        73°
        4AM
        73°
        5AM
        73°
        6AM
        73°
        6:51AM
        Sunrise
        7AM
        72°
        8AM
        74°
        9AM
        77°
        10AM
        78°
        11AM
        80°
        12PM
        82°
        1PM
        83°
        2PM
        84°
        Precipitation
        74%
        Rain ends by 4 PM
        Pollen
        Ragweed Pollen
        High
        Air Quality
        51
        Moderate
        UV Index
        2
        Low
        Additional Conditions
        1. Pressure 30.13 in
        2. Visibility 8 miles
        3. Clouds Cloudy
        4. Dew Point71°F
        5. Humidity 82%
        6. Rainfall 0.42 in
        7. Snow Depth 0 in
         KCGS Station History
        Almanac for September 17, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 90°F 79°F 96°F 1991
        4. Low 67°F 59°F 40°F 1986
        5. Rain/Snow Depth
        6. Precipitation 0.04 in 3.2 in -
        7. Snow 0 in 0 in -
        Almanac for September 18, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 86°F 79°F 96°F
        4. Low 67°F 59°F 38°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 6:50 AM 7:12 PM
        3. Civil Twilight 6:24 AM 7:39 PM
        4. Nautical Twilight 5:52 AM 8:10PM
        5. Astronomical Twilight 5:20 AM 8:42 PM
        1. Length of Visible Light 13h 15m
        2. Length of Day 12h 21m
        3. Tomorrow will be 2 minutes 31 seconds shorter
        1. Moon 1:41 PM 10:39 PM
        2. Waxing Crescent39% of the Moon is Illuminated
        Sep 18
        Waxing Half First Qtr
        Sep 26
        Full Moon
        Oct 3
        Waning Half Last Qtr
        Oct 10
        New Moon
        Precipitation
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