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      Elev 302 ft, 38.748 °N 77.459 °W

      Manassas, VA

      Updated: 6:53 PM EDT on September 20, 2026 (GMT -4)
      10 minutes ago
      85°
      68°
      81
      Feels Like 86
      Partly Cloudy
      N
      2
      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
        Sun 09/20
        Low 65°f
        20% Precip. / 0 in
        Cloudy skies early, then partly cloudy after midnight. Slight chance of a rain shower. Low around 65F. Winds NNW at 5 to 10 mph.
        Tomorrow
        Mon 09/21
        High 70°f
        48% Precip. / 0.02 in
        Cloudy in the morning, then off and on rain showers during the afternoon hours. High around 70F. Winds NE at 5 to 10 mph. Chance of rain 50%.
        Tomorrow night
        Mon 09/21
        Low 61°f
        81% Precip. / 0.36 in
        Showers early, becoming a steady rain late. Low 61F. Winds NE at 5 to 10 mph. Chance of rain 80%. Rainfall near a quarter of an inch.
        Hourly Forecast
        Now
        80°
        7PM
        80°
        7:10PM
        Sunset
        8PM
        76°
        9PM
        74°
        10PM
        72°
        11PM
        72°
        12AM
        72°
        1AM
        71°
        2AM
        71°
        3AM
        70°
        4AM
        69°
        5AM
        68°
        6AM
        68°
        6:56AM
        Sunrise
        7AM
        66°
        8AM
        68°
        9AM
        68°
        10AM
        69°
        11AM
        69°
        12PM
        69°
        1PM
        69°
        2PM
        49%
        69°
        3PM
        31%
        68°
        4PM
        68°
        5PM
        67°
        6PM
        66°
        Additional Conditions
        1. Pressure 29.87 in
        2. Visibility 10 miles
        3. Clouds Partly Cloudy
        4. Dew Point70°F
        5. Humidity 71%
        6. Rainfall 0 in
        7. Snow Depth 0 in
        KHEF Station History
        Almanac for September 20, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 85°F 79°F 97°F 1895
        4. Low 68°F 54°F 43°F 1973
        5. Rain/Snow Depth
        6. Precipitation 0 in 0.1 in -
        7. Snow 0 in - in -
        Almanac for September 21, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 72°F 79°F 97°F
        4. Low 68°F 54°F 33°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 6:55 AM 7:09 PM
        3. Civil Twilight 6:29 AM 7:36 PM
        4. Nautical Twilight 5:58 AM 8:07PM
        5. Astronomical Twilight 5:26 AM 8:39 PM
        1. Length of Visible Light 13h 7m
        2. Length of Day 12h 14m
        3. Tomorrow will be 2 minutes 30 seconds shorter
        1. Moon 4:07 PM 12:29 AM
        2. Waxing Gibbous68% 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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        Weather Alerts
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