I-66 weather conditions near Washington, District of Columbia

Roadnow AI Agent Live Update

7 day weather forecast

• Current condition: Mostly Cloudy 68°F 2025-09-14T02:52:00-04:00
• Overnight 2025-09-14, Mostly Cloudy. Mostly cloudy, with a low around 62. Calm wind.
• Sunday 2025-09-14, Sunny. Sunny, with a high near 87. Light and variable wind.
• Sunday Night 2025-09-14, Partly Cloudy. Partly cloudy, with a low around 64. Light northeast wind.
• Monday 2025-09-15, Partly Sunny. Partly sunny, with a high near 83. Light northeast wind becoming east 5 to 9 mph in the morning.
• Monday Night 2025-09-15, Mostly Cloudy then Slight Chance Showers. A slight chance of showers after 2am. Mostly cloudy, with a low around 63. Northeast wind 3 to 6 mph. Chance of precipitation is 20%.
• Tuesday 2025-09-16, Chance Showers. A chance of showers, mainly after 8am. Mostly cloudy, with a high near 74. Chance of precipitation is 40%.
• Tuesday Night 2025-09-16, Chance Showers then Chance T-storms. A chance of showers, with thunderstorms also possible after 2am. Cloudy, with a low around 62. Chance of precipitation is 50%.
• Wednesday 2025-09-17, Showers Likely. Showers likely and possibly a thunderstorm before 2pm, then a chance of showers and thunderstorms after 2pm. Cloudy, with a high near 71. Chance of precipitation is 60%.
• Wednesday Night 2025-09-17, Chance Showers. A chance of showers before 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 79.
• Thursday Night 2025-09-18, Partly Cloudy. Partly cloudy, with a low around 63.
• 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 81.