I-66 weather conditions near Washington, District of Columbia

Roadnow AI Agent Live Update

7 day weather forecast

• Current condition: Overcast 48°F 2025-11-18T15:52:00-05:00
• This Afternoon 2025-11-18, Chance Rain. A chance of rain, mainly after 5pm. Cloudy, with a high near 50. South wind around 5 mph. Chance of precipitation is 30%.
• Tonight 2025-11-18, Rain and Patchy Fog. Rain. Patchy fog before 1am, then patchy fog after 2am. Low around 41. Calm wind becoming east around 5 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
• Wednesday 2025-11-19, Chance Rain and Patchy Fog then Cloudy. A chance of rain before 7am. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 52. Calm wind becoming north 5 to 7 mph in the morning. Chance of precipitation is 30%.
• Wednesday Night 2025-11-19, Mostly Cloudy. Mostly cloudy, with a low around 41. Light north wind.
• Thursday 2025-11-20, Cloudy. Cloudy, with a high near 53. Light and variable wind.
• Thursday Night 2025-11-20, Cloudy. Cloudy, with a low around 45.
• Friday 2025-11-21, Mostly Cloudy. Mostly cloudy, with a high near 60.
• Friday Night 2025-11-21, Rain Likely. Rain likely, mainly after 1am. Mostly cloudy, with a low around 48. Chance of precipitation is 70%.
• Saturday 2025-11-22, Chance Rain. A chance of rain. Mostly cloudy, with a high near 55. Chance of precipitation is 40%.
• Saturday Night 2025-11-22, Chance Rain. A chance of rain before 1am. Mostly cloudy, with a low around 40. Chance of precipitation is 30%.
• Sunday 2025-11-23, Mostly Sunny. Mostly sunny, with a high near 57.
• Sunday Night 2025-11-23, Mostly Clear. Mostly clear, with a low around 40.
• Monday 2025-11-24, Sunny. Sunny, with a high near 59.
• Monday Night 2025-11-24, Partly Cloudy. Partly cloudy, with a low around 43.
• Tuesday 2025-11-25, Mostly Sunny. Mostly sunny, with a high near 58.