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      Elev 477 ft, 39.163 °N 77.177 °W

      Gaithersburg, MD

      Montgomery County Airpark Station64°
      Updated: 7:35 PM EDT on September 21, 2026 (GMT -4)
      11 seconds ago
      72°
      61°
      64
      Feels Like 64
      Cloudy
      N
      3
      Lower temperature is expected tomorrow
      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
        Mon 09/21
        Low 58°f
         83% Precip. / 0.25 in
        Cloudy skies with periods of rain late. Low 58F. Winds ENE at 5 to 10 mph. Chance of rain 80%. Rainfall near a quarter of an inch.
        Tomorrow
        Tue 09/22
        High 60°f
         96% Precip. / 0.46 in
        Cloudy with periods of rain. High near 60F. Winds ENE at 10 to 15 mph. Chance of rain 100%. Rainfall near a half an inch.
        Tomorrow night
        Tue 09/22
        Low 52°f
         73% Precip. / 0.3 in
        Rain likely. Low 52F. Winds NE at 5 to 10 mph. Chance of rain 70%. Rainfall around a quarter of an inch.
        Hourly Forecast
        Now
        63°
        8PM
        62°
        9PM
        62°
        10PM
        61°
        11PM
        62°
        12AM
        62°
        1AM
        30%
        62°
        2AM
        46%
        62°
        3AM
        74%
        62°
        4AM
        77%
        62°
        5AM
        83%
        62°
        6AM
        81%
        61°
        6:56AM
        Sunrise
        7AM
        80%
        59°
        8AM
        96%
        59°
        9AM
        79%
        59°
        10AM
        78%
        59°
        11AM
        70%
        59°
        12PM
        74%
        59°
        1PM
        90%
        59°
        2PM
        85%
        58°
        3PM
        69%
        59°
        4PM
        81%
        59°
        5PM
        88%
        59°
        6PM
        73%
        59°
        7PM
        70%
        59°
        Precipitation
        96%
        Rain possible after 1 AM
        Pollen
        Ragweed Pollen
        Moderate
        Air Quality
        18
        Good
        UV Index
        0
        Low
        Additional Conditions
        1. Pressure 30.06 in
        2. Visibility 10 miles
        3. Clouds Cloudy
        4. Dew Point63°F
        5. Humidity 100%
        6. Rainfall 0.52 in
        7. Snow Depth 0 in
         KGAI Station History
        Almanac for September 21, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 72°F 76°F 91°F 1965
        4. Low 61°F 58°F 37°F 1962
        5. Rain/Snow Depth
        6. Precipitation 0.25 in - in -
        7. Snow 0 in - in -
        Almanac for September 22, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 63°F 75°F 95°F
        4. Low 61°F 58°F 38°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 6:55 AM 7:07 PM
        3. Civil Twilight 6:28 AM 7:33 PM
        4. Nautical Twilight 5:57 AM 8:05PM
        5. Astronomical Twilight 5:25 AM 8:36 PM
        1. Length of Visible Light 13h 5m
        2. Length of Day 12h 11m
        3. Tomorrow will be 2 minutes 32 seconds shorter
        1. Moon 4:42 PM 1:27 AM
        2. Waxing Gibbous77% 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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