I-495 MA weather conditions near Chelmsford, Massachusetts
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Seasoned Weather Conditions
Current Weather Conditions
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7 day weather forecast
Current condition: Partly Cloudy 86°F 2025-07-07T14:51:00-04:00 
This Afternoon 2025-07-07, Slight Chance Showers. A slight chance of showers. Partly sunny and hot, with a high near 90. Heat index values as high as 99. Southwest wind around 9 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Tonight 2025-07-07, Slight Chance Showers. A slight chance of showers. Mostly cloudy, with a low around 73. Southwest wind 5 to 7 mph. Chance of precipitation is 20%.Tuesday 2025-07-08, Chance Showers then Chance T-storms. A chance of showers, with thunderstorms also possible after 2pm. Partly sunny and hot, with a high near 90. Heat index values as high as 96. West wind 3 to 6 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday Night 2025-07-08, T-storms Likely. Showers and thunderstorms likely before 2am, then a chance of showers. Mostly cloudy, with a low around 67. Light northeast wind. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday 2025-07-09, Chance Showers. A chance of showers, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 76. Northeast wind 3 to 5 mph. Chance of precipitation is 30%.
Wednesday Night 2025-07-09, Chance Showers. A chance of showers and thunderstorms. Mostly cloudy, with a low around 63. Light northeast wind. Chance of precipitation is 30%.
Thursday 2025-07-10, Chance Showers. A chance of showers. Mostly cloudy, with a high near 76. Calm wind becoming east around 6 mph in the afternoon. Chance of precipitation is 40%.- Thursday Night 2025-07-10, Chance Showers. A chance of showers. Mostly cloudy, with a low around 63. Light east wind. Chance of precipitation is 30%.
Friday 2025-07-11, Mostly Cloudy. Mostly cloudy, with a high near 76. East wind 3 to 6 mph.
Friday Night 2025-07-11, Mostly Cloudy. Mostly cloudy, with a low around 60. Light northeast wind.- Saturday 2025-07-12, Mostly Sunny. Mostly sunny, with a high near 79. Calm wind becoming east around 6 mph in the afternoon.
Saturday Night 2025-07-12, Partly Cloudy. Partly cloudy, with a low around 61. Light and variable wind.- Sunday 2025-07-13, Partly Sunny. Partly sunny, with a high near 83. Calm wind becoming south around 6 mph in the afternoon.
- Sunday Night 2025-07-13, Partly Cloudy. Partly cloudy, with a low around 64. Southeast wind around 5 mph becoming calm in the evening.
- Monday 2025-07-14, Mostly Sunny. Mostly sunny, with a high near 84.