20119 Weather (Bristow, VA)

Weather forecast for: Washington Manassas Airport VA

Last Update: 7:52 pm EDT Sep 2, 2026

Tonight: A slight chance of showers and thunderstorms between 11pm and 1am. Partly cloudy, with a low around 73. Light south wind. Chance of precipitation is 20%.

Thursday: A chance of showers and thunderstorms, mainly between 4pm and 5pm. Mostly sunny, with a high near 96. Heat index values as high as 107. Calm wind becoming west around 6 mph in the afternoon. Chance of precipitation is 30%.

Thursday Night: A chance of showers and thunderstorms before midnight, then a slight chance of showers between midnight and 2am. Partly cloudy, with a low around 74. West wind around 5 mph becoming calm after midnight. Chance of precipitation is 30%.

Friday: A chance of showers and thunderstorms after 2pm. Increasing clouds, with a high near 94. Heat index values as high as 102. Calm wind becoming northwest 5 to 8 mph in the afternoon. Chance of precipitation is 50%.

Friday Night: A chance of showers and thunderstorms before 11pm, then a chance of showers between 11pm and 2am. Mostly cloudy, with a low around 71. Northwest wind 3 to 5 mph. Chance of precipitation is 40%.

Saturday: Mostly sunny, with a high near 87.

Saturday Night: Partly cloudy, with a low around 62.

Sunday: Mostly sunny, with a high near 83.

Sunday Night: Partly cloudy, with a low around 60.

Labor Day: Mostly sunny, with a high near 83.

Monday Night: Partly cloudy, with a low around 62.

Tuesday: Mostly sunny, with a high near 87.

Tuesday Night: Partly cloudy, with a low around 65.

Wednesday: Mostly sunny, with a high near 88.