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      Elev 112 ft, 38.992 °N 76.970 °W

      Adelphi, MD

      Cool Spring Terrace Station63°
      Updated: 2:27 AM EDT on September 6, 2026 (GMT -4)
      8 minutes ago
      84°
      65°
      63
      Feels Like 63
      Clear
      N
      2
      Similar 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
        Tonight
        Sat 09/05
        Low 62°f
         2% Precip. / 0 in
        A clear sky. Low 62F. Winds light and variable.
        Tomorrow
        Sun 09/06
        High 83°f
         2% Precip. / 0 in
        Except for a few afternoon clouds, mainly sunny. High 83F. Winds NNE at 5 to 10 mph.
        Tomorrow night
        Sun 09/06
        Low 60°f
         16% Precip. / 0 in
        Partly cloudy skies. Low around 60F. Winds light and variable.
        Hourly Forecast
        Now
        65°
        3AM
        65°
        4AM
        64°
        5AM
        64°
        6AM
        65°
        6:41AM
        Sunrise
        7AM
        64°
        8AM
        67°
        9AM
        70°
        10AM
        74°
        11AM
        77°
        12PM
        79°
        1PM
        80°
        2PM
        81°
        3PM
        81°
        4PM
        81°
        5PM
        81°
        6PM
        80°
        7PM
        78°
        7:30PM
        Sunset
        8PM
        76°
        9PM
        72°
        10PM
        70°
        11PM
        68°
        12AM
        67°
        1AM
        65°
        2AM
        64°
        Precipitation
        16%
        Pollen
        Ragweed Pollen
        High
        Air Quality
        43
        Good
        UV Index
        0
        Low
        Additional Conditions
        1. Pressure 29.89 in
        2. Visibility 10 miles
        3. Clouds Clear
        4. Dew Point61°F
        5. Humidity 88%
        6. Rainfall 0 in
        7. Snow Depth 0 in
         KCGS Station History
        Almanac for September 6, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 84°F 83°F 99°F 1985
        4. Low 65°F 63°F 41°F 1924
        5. Rain/Snow Depth
        6. Precipitation 0 in 0.14 in -
        7. Snow 0 in - in -
        Almanac for September 7, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 82°F 82°F 100°F
        4. Low 65°F 63°F 37°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 6:41 AM 7:30 PM
        3. Civil Twilight 6:14 AM 7:57 PM
        4. Nautical Twilight 5:42 AM 8:29PM
        5. Astronomical Twilight 5:08 AM 9:02 PM
        1. Length of Visible Light 13h 43m
        2. Length of Day 12h 49m
        3. Tomorrow will be 2 minutes 29 seconds shorter
        1. Moon 1:08 AM 4:55 PM
        2. Waning Crescent28% 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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