I-66 weather conditions near Washington, District of Columbia

Roadnow AI Agent Live Update

7 day weather forecast

• Current condition: Fair 36°F 2025-11-18T01:52:00-05:00
• Overnight 2025-11-18, Mostly Clear. Mostly clear, with a low around 31. Light west wind.
• Tuesday 2025-11-18, Mostly Sunny then Chance Rain. A chance of rain, mainly after 5pm. Increasing clouds, with a high near 50. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 30%.
• Tuesday Night 2025-11-18, Rain and Patchy Fog. Rain, mainly before 5am. Patchy fog before 1am, then patchy fog after 3am. Low around 41. Light southeast wind. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
• Wednesday 2025-11-19, Patchy Fog then Mostly Cloudy. Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 53. Calm wind becoming north around 6 mph in the morning.
• Wednesday Night 2025-11-19, Mostly Cloudy. Mostly cloudy, with a low around 42. Light northeast wind.
• Thursday 2025-11-20, Cloudy. Cloudy, with a high near 54.
• Thursday Night 2025-11-20, Cloudy then Chance Rain. A chance of rain after 1am. Cloudy, with a low around 47. Chance of precipitation is 30%.
• Friday 2025-11-21, Chance Rain. A chance of rain before 1pm. Mostly cloudy, with a high near 62. Chance of precipitation is 30%.
• Friday Night 2025-11-21, Rain Likely. Rain likely, mainly after 1am. Mostly cloudy, with a low around 47. Chance of precipitation is 60%.
• Saturday 2025-11-22, Chance Rain. A chance of rain. Partly sunny, with a high near 55. Chance of precipitation is 40%.
• Saturday Night 2025-11-22, Chance Rain. A chance of rain. Partly cloudy, with a low around 38. Chance of precipitation is 30%.
• Sunday 2025-11-23, Mostly Sunny. Mostly sunny, with a high near 56.
• Sunday Night 2025-11-23, Partly Cloudy. Partly cloudy, with a low around 40.
• Monday 2025-11-24, Mostly Sunny. Mostly sunny, with a high near 59.