I-66 weather conditions near Fairfax, Virginia
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Seasoned Weather Conditions
Current Weather Conditions
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7 day weather forecast
Current condition: Fog/Mist 74°F 2025-06-18T03:52:00-04:00 
Overnight 2025-06-18, Slight Chance Showers. A slight chance of showers before 5am. Mostly cloudy, with a low around 71. Light south wind. Chance of precipitation is 20%.Wednesday 2025-06-18, Chance Showers then Showers Likely. A chance of showers and thunderstorms before 4pm, then showers likely and possibly a thunderstorm between 4pm and 5pm, then a chance of showers and thunderstorms after 5pm. Mostly cloudy, then gradually becoming sunny, with a high near 89. Southwest wind 5 to 9 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday Night 2025-06-18, Chance T-storms then Mostly Clear. A chance of thunderstorms before 8pm. Mostly clear, with a low around 73. Southwest wind around 6 mph. Chance of precipitation is 30%.
Juneteenth 2025-06-19, Sunny then T-storms. Showers and possibly a thunderstorm after 2pm. High near 93. Heat index values as high as 100. Southwest wind 8 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night 2025-06-19, T-storms then Chance Showers. Showers and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Low around 66. Northwest wind 6 to 9 mph. Chance of precipitation is 80%.
Friday 2025-06-20, Sunny. Sunny, with a high near 86.
Friday Night 2025-06-20, Partly Cloudy. Partly cloudy, with a low around 66.- Saturday 2025-06-21, Sunny. Sunny, with a high near 90.
- Saturday Night 2025-06-21, Partly Cloudy. Partly cloudy, with a low around 71.
Sunday 2025-06-22, Mostly Sunny. Mostly sunny, with a high near 95.
Sunday Night 2025-06-22, Mostly Clear. Mostly clear, with a low around 75.
Monday 2025-06-23, Hot. Sunny and hot, with a high near 97.- Monday Night 2025-06-23, Mostly Clear. Mostly clear, with a low around 77.
- Tuesday 2025-06-24, Hot. Sunny and hot, with a high near 99.