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      Elev 510 ft, 39.142 °N 77.193 °W

      Gaithersburg, MD

      Gaithersburg Station78°
      Updated: 12:42 PM EDT on September 19, 2026 (GMT -4)
      3 minutes ago
      77°
      62°
      78
      Feels Like 79
      Cloudy
      N
      4
      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
        Sat 09/19
        High 77°f
         1% Precip. / 0 in
        Overcast. High 77F. Winds light and variable.
        Tonight
        Sat 09/19
        Low 68°f
         19% Precip. / 0 in
        Cloudy. Low 68F. Winds SE at 5 to 10 mph.
        Tomorrow
        Sun 09/20
        High 80°f61°f
         44% Precip. / 0.03 in
        Scattered thunderstorms developing during the afternoon. High around 80F. Winds SSW at 5 to 10 mph. Chance of rain 40%.
        Hourly Forecast
        Now
        76°
        1PM
        76°
        2PM
        76°
        3PM
        76°
        4PM
        76°
        5PM
        76°
        6PM
        75°
        7PM
        73°
        7:10PM
        Sunset
        8PM
        72°
        9PM
        70°
        10PM
        70°
        11PM
        69°
        12AM
        69°
        1AM
        69°
        2AM
        70°
        3AM
        70°
        4AM
        69°
        5AM
        69°
        6AM
        69°
        6:54AM
        Sunrise
        7AM
        69°
        8AM
        69°
        9AM
        71°
        10AM
        73°
        11AM
        76°
        12PM
        78°
        Precipitation
        21%
        Pollen
        Ragweed Pollen
        High
        Air Quality
        22
        Good
        UV Index
        1
        Low
        Additional Conditions
        1. Pressure 30.11 in
        2. Visibility 10 miles
        3. Clouds Cloudy
        4. Dew Point61°F
        5. Humidity 61%
        6. Rainfall 0 in
        7. Snow Depth 0 in
         KGAI Station History
        Almanac for September 19, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 77°F 76°F 91°F 1978
        4. Low 62°F 59°F 40°F 1973
        5. Rain/Snow Depth
        6. Precipitation 0 in - in -
        7. Snow 0 in - in -
        Almanac for September 20, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 80°F 76°F 91°F
        4. Low 62°F 59°F 32°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 6:53 AM 7:10 PM
        3. Civil Twilight 6:27 AM 7:37 PM
        4. Nautical Twilight 5:55 AM 8:08PM
        5. Astronomical Twilight 5:23 AM 8:40 PM
        1. Length of Visible Light 13h 10m
        2. Length of Day 12h 16m
        3. Tomorrow will be 2 minutes 31 seconds shorter
        1. Moon 3:26 PM -
        2. Waxing Gibbous59% 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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