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      Small Craft Advisory
      until 6:00 PM EDT
      Elev 292 ft, 39.002 °N 77.284 °W

      Great Falls, VA

      Great Falls Station63°
      Updated: 11:47 AM EDT on September 25, 2026 (GMT -4)
      2 minutes ago
      72°
      47°
      63
      Feels Like 63
      Sunny
      N
      12
      Gusts 22 mph
      Higher temperature is expected today
      Wundermap
      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
        Fri 09/25
        High 72°f
         0% Precip. / 0 in
        Sunny to partly cloudy. High 72F. Winds N at 10 to 20 mph.
        Tonight
        Fri 09/25
        Low 53°f
         4% Precip. / 0 in
        Partly cloudy skies. Low 53F. Winds NNW at 10 to 15 mph.
        Tomorrow
        Sat 09/26
        High 71°f58°f
         40% Precip. / 0.03 in
        Partly cloudy early followed by increasing clouds with showers developing later in the day. High 71F. Winds NNW at 10 to 20 mph. Chance of rain 40%.
        Hourly Forecast
        Now
        63°
        12PM
        64°
        1PM
        67°
        2PM
        69°
        3PM
        70°
        4PM
        70°
        5PM
        70°
        6PM
        69°
        7PM
        67°
        7:01PM
        Sunset
        8PM
        64°
        9PM
        62°
        10PM
        61°
        11PM
        60°
        12AM
        59°
        1AM
        58°
        2AM
        57°
        3AM
        57°
        4AM
        56°
        5AM
        55°
        6AM
        55°
        7AM
        54°
        7:00AM
        Sunrise
        8AM
        56°
        9AM
        59°
        10AM
        63°
        11AM
        66°
        Precipitation
        4%
        Pollen
        Ragweed Pollen
        High
        Air Quality
        18
        Good
        UV Index
        6
        High
        Additional Conditions
        1. Pressure 30.12 in
        2. Visibility 10 miles
        3. Clouds Clear
        4. Dew Point44°F
        5. Humidity 49%
        6. Rainfall 0 in
        7. Snow Depth 0 in
         KIAD Station History
        Almanac for September 25, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 72°F 74°F 93°F 1970
        4. Low 47°F 56°F 34°F 1974
        5. Rain/Snow Depth
        6. Precipitation 0 in - in -
        7. Snow 0 in - in -
        Almanac for September 26, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 71°F 73°F 91°F
        4. Low 47°F 56°F 38°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 6:59 AM 7:01 PM
        3. Civil Twilight 6:33 AM 7:27 PM
        4. Nautical Twilight 6:01 AM 7:58PM
        5. Astronomical Twilight 5:30 AM 8:30 PM
        1. Length of Visible Light 12h 54m
        2. Length of Day 12h 1m
        3. Tomorrow will be 2 minutes 31 seconds shorter
        1. Moon 6:25 PM 5:46 AM
        2. Waxing Gibbous99% 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
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