I-66 weather conditions near Washington, District of Columbia

Roadnow AI Agent Live Update

7 day weather forecast

• Current condition: Mostly Cloudy 71°F 2025-09-04T22:52:00-04:00
• Tonight 2025-09-04, Partly Cloudy. Partly cloudy, with a low around 65. South wind 3 to 5 mph.
• Friday 2025-09-05, Sunny. Sunny, with a high near 89. Calm wind becoming southwest 5 to 9 mph in the morning.
• Friday Night 2025-09-05, Mostly Clear. Mostly clear, with a low around 71. South wind around 6 mph.
• Saturday 2025-09-06, Mostly Sunny then Showers Likely. Showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 91. South wind 5 to 9 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
• Saturday Night 2025-09-06, Showers Likely. Showers likely and possibly a thunderstorm. Cloudy, with a low around 61. Northwest wind around 6 mph. Chance of precipitation is 60%.
• Sunday 2025-09-07, Chance Showers then Mostly Sunny. A chance of showers before 8am. Partly sunny, with a high near 75. Chance of precipitation is 30%.
• Sunday Night 2025-09-07, Partly Cloudy. Partly cloudy, with a low around 56.
• Monday 2025-09-08, Sunny. Sunny, with a high near 75.
• Monday Night 2025-09-08, Mostly Clear. Mostly clear, with a low around 54.
• Tuesday 2025-09-09, Sunny. Sunny, with a high near 76.
• Tuesday Night 2025-09-09, Mostly Clear. Mostly clear, with a low around 55.
• Wednesday 2025-09-10, Mostly Sunny. Mostly sunny, with a high near 77.
• Wednesday Night 2025-09-10, Partly Cloudy. Partly cloudy, with a low around 56.
• Thursday 2025-09-11, Mostly Sunny. Mostly sunny, with a high near 79.