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      Small Craft Advisory
      until 6:00 AM EDT
      Elev 112 ft, 38.992 °N 76.970 °W

      Adelphi, MD

      Cool Spring Terrace Station59°
      Updated: 8:52 AM EDT on September 22, 2026 (GMT -4)
      3 minutes ago
      65°
      58°
      59
      Feels Like 59
      Cloudy
      N
      10
      Gusts 18 mph
      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
        Tue 09/22
        High 62°f
         89% Precip. / 0.28 in
        Periods of rain. High 62F. Winds NE at 10 to 15 mph. Chance of rain 90%. Rainfall near a quarter of an inch. Locally heavy rainfall possible.
        Tonight
        Tue 09/22
        Low 54°f
         90% Precip. / 0.19 in
        A steady rain this evening. Showers continuing overnight. Low 54F. Winds NE at 10 to 15 mph. Chance of rain 90%.
        Tomorrow
        Wed 09/23
        High 66°f52°f
         23% Precip. / 0 in
        Cloudy. Slight chance of a rain shower. High 66F. Winds NE at 10 to 15 mph.
        Hourly Forecast
        Now
        59°
        9AM
        58%
        60°
        10AM
        53%
        60°
        11AM
        62%
        60°
        12PM
        37%
        61°
        1PM
        57%
        61°
        2PM
        75%
        61°
        3PM
        78%
        60°
        4PM
        83%
        60°
        5PM
        89%
        61°
        6PM
        88%
        61°
        7PM
        90%
        61°
        7:04PM
        Sunset
        8PM
        78%
        60°
        9PM
        71%
        60°
        10PM
        53%
        60°
        11PM
        40%
        60°
        12AM
        46%
        60°
        1AM
        51%
        59°
        2AM
        55%
        58°
        3AM
        47%
        58°
        4AM
        39%
        58°
        5AM
        57°
        6AM
        35%
        57°
        6:56AM
        Sunrise
        7AM
        56°
        8AM
        55°
        Precipitation
        90%
        Rain likely around 9:15 AM
        Pollen
        Ragweed Pollen
        Moderate
        Air Quality
        23
        Good
        UV Index
        1
        Low
        Additional Conditions
        1. Pressure 30.16 in
        2. Visibility 9 miles
        3. Clouds Cloudy
        4. Dew Point58°F
        5. Humidity 95%
        6. Rainfall 1.2 in
        7. Snow Depth 0 in
         KCGS Station History
        Almanac for September 22, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 65°F 78°F 100°F 1931
        4. Low 58°F 58°F 35°F 1962
        5. Rain/Snow Depth
        6. Precipitation 0.47 in 0.14 in -
        7. Snow 0 in - in -
        Almanac for September 23, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 66°F 77°F 100°F
        4. Low 58°F 57°F 30°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 6:55 AM 7:04 PM
        3. Civil Twilight 6:29 AM 7:31 PM
        4. Nautical Twilight 5:57 AM 8:02PM
        5. Astronomical Twilight 5:26 AM 8:34 PM
        1. Length of Visible Light 13h 2m
        2. Length of Day 12h 9m
        3. Tomorrow will be 2 minutes 30 seconds shorter
        1. Moon 5:10 PM 2:30 AM
        2. Waxing Gibbous85% of the Moon is Illuminated
        Sep 26
        Full Moon
        Oct 3
        Waning Half Last Qtr
        Oct 10
        New Moon
        Oct 18
        Waxing Half First Qtr
        Precipitation
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