I-66 weather conditions near Derwood, Maryland

Roadnow AI Agent Live Update

7 day weather forecast

• Current condition: Overcast 61°F 2025-09-07T02:56:00-04:00
• Overnight 2025-09-07, Showers Likely and Patchy Fog. Showers likely, mainly before 5am. Patchy fog. Otherwise, cloudy, with a low around 60. Northwest wind around 6 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
• Sunday 2025-09-07, Chance Showers then Sunny. A chance of showers, mainly before 9am. Cloudy through mid morning, then gradual clearing, with a high near 75. Northwest wind around 7 mph. Chance of precipitation is 30%.
• Sunday Night 2025-09-07, Mostly Clear. Mostly clear, with a low around 51. Northwest wind around 6 mph.
• Monday 2025-09-08, Sunny. Sunny, with a high near 75. Northeast wind around 6 mph.
• Monday Night 2025-09-08, Mostly Clear. Mostly clear, with a low around 51. Light northeast wind.
• Tuesday 2025-09-09, Mostly Sunny. Mostly sunny, with a high near 76.
• Tuesday Night 2025-09-09, Partly Cloudy. Partly cloudy, with a low around 55.
• Wednesday 2025-09-10, Partly Sunny. Partly sunny, with a high near 76.
• Wednesday Night 2025-09-10, Partly Cloudy. Partly cloudy, with a low around 55.
• Thursday 2025-09-11, Sunny. Sunny, with a high near 81.
• Thursday Night 2025-09-11, Mostly Clear. Mostly clear, with a low around 57.
• Friday 2025-09-12, Sunny. Sunny, with a high near 78.
• Friday Night 2025-09-12, Mostly Clear. Mostly clear, with a low around 55.
• Saturday 2025-09-13, Mostly Sunny. Mostly sunny, with a high near 76.