| NWS Forecast for: Fairfax VA Issued by: National Weather Service Baltimore, MD/Washington, D.C. Last Update: 5:11 pm EDT Aug 14, 2026 |  |
| Tonight: A chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and 10pm. Mostly cloudy, with a low around 21. Calm wind. Chance of precipitation is 30%. Saturday: Mostly sunny, with a high near 31. North wind 5 to 8 km/h becoming southeast in the afternoon. Saturday Night: Mostly cloudy, with a low around 22. Calm wind. Sunday: Showers likely, with thunderstorms also possible after 11am. Mostly cloudy, with a high near 30. South wind 10 to 16 km/h, with gusts as high as 29 km/h. Chance of precipitation is 70%. New rainfall amounts between 5 and 7.5 mm possible. Sunday Night: Showers likely and possibly a thunderstorm before 2am. Mostly cloudy, with a low around 23. West wind around 11 km/h. Chance of precipitation is 60%. Monday: A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 31. Chance of precipitation is 20%. Monday Night: Partly cloudy, with a low around 21. Tuesday: Sunny, with a high near 30. Tuesday Night: Mostly clear, with a low around 20. Wednesday: Sunny, with a high near 31. Wednesday Night: A slight chance of showers. Partly cloudy, with a low around 22. Chance of precipitation is 20%. Thursday: A chance of showers and thunderstorms. Mostly sunny, with a high near 32. Chance of precipitation is 40%. Thursday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 21. Chance of precipitation is 30%. Friday: A slight chance of showers. Mostly sunny, with a high near 28. Chance of precipitation is 20%. | |
| Fairfax VA 38.85°N 77.29°W (Elev. 400 m) | |
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