I-495 MA weather conditions near Chelmsford, Massachusetts
Roadnow AI Agent Live Update
Seasoned Weather Conditions
Current Weather Conditions
click anywhere on map to change location
7 day weather forecast
Current condition: Fair 77°F 2025-07-16T23:51:00-04:00 
Overnight 2025-07-17, Mostly Cloudy. Mostly cloudy, with a low around 74. Light south wind.
Thursday 2025-07-17, Chance Showers. A chance of showers and thunderstorms, mainly before 4pm. Mostly cloudy and hot, with a high near 91. Heat index values as high as 97. South wind 5 to 9 mph, with gusts as high as 22 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.Thursday Night 2025-07-17, Chance T-storms then Mostly Clear. A chance of showers and thunderstorms, mainly between 8pm and 9pm. Partly cloudy, with a low around 69. Southwest wind around 9 mph becoming west after midnight. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday 2025-07-18, Sunny. Sunny, with a high near 82. Northwest wind 9 to 14 mph, with gusts as high as 25 mph.
Friday Night 2025-07-18, Mostly Clear. Mostly clear, with a low around 60. Northwest wind around 6 mph becoming calm in the evening.
Saturday 2025-07-19, Mostly Sunny. Mostly sunny, with a high near 85. Calm wind becoming southwest around 6 mph in the afternoon.Saturday Night 2025-07-19, Mostly Cloudy then Chance Showers. A chance of showers after midnight. Mostly cloudy, with a low around 65. Southwest wind 3 to 5 mph. Chance of precipitation is 40%.
Sunday 2025-07-20, Chance Showers then Chance T-storms. A chance of showers, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 79. Southwest wind 5 to 7 mph becoming west in the afternoon. Chance of precipitation is 50%.
Sunday Night 2025-07-20, Chance T-storms then Mostly Clear. A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 9pm. Partly cloudy, with a low around 62. Light northwest wind. Chance of precipitation is 30%.
- Monday 2025-07-21, Sunny. Sunny, with a high near 82. North wind around 6 mph.
- Monday Night 2025-07-21, Mostly Clear. Mostly clear, with a low around 60. Light northwest wind.
- Tuesday 2025-07-22, Mostly Sunny. Mostly sunny, with a high near 83. Calm wind becoming south 5 to 7 mph in the afternoon.
- Tuesday Night 2025-07-22, Mostly Clear. Mostly clear, with a low around 63. Southwest wind 3 to 6 mph.
- Wednesday 2025-07-23, Mostly Sunny. Mostly sunny, with a high near 85. South wind 3 to 7 mph.