I-66 weather conditions near Washington, District of Columbia

Roadnow AI Agent Live Update

7 day weather forecast

• Current condition: Partly Cloudy 69°F 2025-09-13T23:52:00-04:00
• Overnight 2025-09-14, Partly Cloudy. Partly cloudy, with a low around 61. South wind 3 to 5 mph.
• Sunday 2025-09-14, Sunny. Sunny, with a high near 86. Light and variable wind.
• Sunday Night 2025-09-14, Partly Cloudy. Partly cloudy, with a low around 64. Southeast wind around 5 mph becoming calm in the evening.
• Monday 2025-09-15, Partly Sunny. Partly sunny, with a high near 83. Calm wind becoming east 5 to 7 mph in the morning.
• Monday Night 2025-09-15, Mostly Cloudy. Mostly cloudy, with a low around 63. East wind 3 to 6 mph.
• Tuesday 2025-09-16, Chance Showers. A chance of showers, mainly after 2pm. Mostly cloudy, with a high near 76. Chance of precipitation is 30%.
• Tuesday Night 2025-09-16, Chance Showers then Chance T-storms. A chance of showers, with thunderstorms also possible after 2am. Mostly cloudy, with a low around 62. Chance of precipitation is 40%.
• Wednesday 2025-09-17, Chance T-storms. A chance of showers and thunderstorms before 8am, then a chance of showers between 8am and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 71. Chance of precipitation is 40%.
• Wednesday Night 2025-09-17, Chance T-storms then Chance Showers. A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 2am. Mostly cloudy, with a low around 63. Chance of precipitation is 30%.
• Thursday 2025-09-18, Partly Sunny. Partly sunny, with a high near 80.
• Thursday Night 2025-09-18, Mostly Clear. Mostly clear, with a low around 64.
• Friday 2025-09-19, Sunny. Sunny, with a high near 86.
• Friday Night 2025-09-19, Partly Cloudy. Partly cloudy, with a low around 65.
• Saturday 2025-09-20, Mostly Sunny. Mostly sunny, with a high near 82.