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: Fair 68°F 2025-07-12T22:51:00-04:00
Tonight 2025-07-12, Patchy Fog. Patchy fog after 1am. Otherwise, mostly cloudy, with a low around 64. Light southeast wind.
Sunday 2025-07-13, Gradual Clearing. Cloudy through mid morning, then gradual clearing, with a high near 85. Calm wind becoming southeast 5 to 7 mph in the afternoon.
Sunday Night 2025-07-13, Mostly Clear then Showers Likely and Patchy Fog. Showers likely and possibly a thunderstorm between 4am and 5am, then showers likely after 5am. Patchy fog after 4am. Otherwise, increasing clouds, with a low around 66. Southeast wind around 6 mph becoming calm in the evening. Chance of precipitation is 60%.
Monday 2025-07-14, Showers Likely and Patchy Fog then Chance T-storms. Showers likely, with thunderstorms also possible after 2pm. Patchy fog before 7am. Otherwise, mostly cloudy, with a high near 85. Southwest wind 3 to 6 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday Night 2025-07-14, Chance T-storms then Partly Cloudy. A chance of showers and thunderstorms, mainly before 9pm. Partly cloudy, with a low around 68. Light southwest wind. Chance of precipitation is 30%.
Tuesday 2025-07-15, Hot. Sunny and hot, with a high near 92. Calm wind becoming west around 5 mph in the afternoon.
Tuesday Night 2025-07-15, Mostly Clear. Mostly clear, with a low around 70. Light southwest wind.
Wednesday 2025-07-16, Hot. Sunny and hot, with a high near 93. Calm wind becoming southwest 5 to 7 mph in the afternoon.
Wednesday Night 2025-07-16, Partly Cloudy. Partly cloudy, with a low around 73. Southwest wind around 6 mph.
Thursday 2025-07-17, Mostly Sunny then Chance Showers. A chance of showers after 2pm. Mostly sunny and hot, with a high near 92. Southwest wind 5 to 8 mph. Chance of precipitation is 30%.
Thursday Night 2025-07-17, Chance Showers then Mostly Cloudy. A chance of showers. Mostly cloudy, with a low around 72. Southwest wind 5 to 7 mph. Chance of precipitation is 30%.
Friday 2025-07-18, Chance Showers then Chance T-storms. A chance of showers and thunderstorms. Partly sunny, with a high near 87. Southwest wind around 7 mph. Chance of precipitation is 40%.
Friday Night 2025-07-18, Chance T-storms then Mostly Cloudy. A chance of showers and thunderstorms. Mostly cloudy, with a low around 67. South wind around 5 mph becoming light and variable in the evening. Chance of precipitation is 30%.
Saturday 2025-07-19, Partly Sunny then Chance Showers. A chance of showers. Partly sunny, with a high near 83. North wind 3 to 6 mph. Chance of precipitation is 30%.
Current condition: Fair 68°F 2025-07-12T22:51:00-04:00 
Tonight 2025-07-12, Patchy Fog. Patchy fog after 1am. Otherwise, mostly cloudy, with a low around 64. Light southeast wind.
Sunday 2025-07-13, Gradual Clearing. Cloudy through mid morning, then gradual clearing, with a high near 85. Calm wind becoming southeast 5 to 7 mph in the afternoon.Sunday Night 2025-07-13, Mostly Clear then Showers Likely and Patchy Fog. Showers likely and possibly a thunderstorm between 4am and 5am, then showers likely after 5am. Patchy fog after 4am. Otherwise, increasing clouds, with a low around 66. Southeast wind around 6 mph becoming calm in the evening. Chance of precipitation is 60%.
Monday 2025-07-14, Showers Likely and Patchy Fog then Chance T-storms. Showers likely, with thunderstorms also possible after 2pm. Patchy fog before 7am. Otherwise, mostly cloudy, with a high near 85. Southwest wind 3 to 6 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday Night 2025-07-14, Chance T-storms then Partly Cloudy. A chance of showers and thunderstorms, mainly before 9pm. Partly cloudy, with a low around 68. Light southwest wind. Chance of precipitation is 30%.
Tuesday 2025-07-15, Hot. Sunny and hot, with a high near 92. Calm wind becoming west around 5 mph in the afternoon.
Tuesday Night 2025-07-15, Mostly Clear. Mostly clear, with a low around 70. Light southwest wind.Thursday 2025-07-17, Mostly Sunny then Chance Showers. A chance of showers after 2pm. Mostly sunny and hot, with a high near 92. Southwest wind 5 to 8 mph. Chance of precipitation is 30%.
Thursday Night 2025-07-17, Chance Showers then Mostly Cloudy. A chance of showers. Mostly cloudy, with a low around 72. Southwest wind 5 to 7 mph. Chance of precipitation is 30%.
Friday 2025-07-18, Chance Showers then Chance T-storms. A chance of showers and thunderstorms. Partly sunny, with a high near 87. Southwest wind around 7 mph. Chance of precipitation is 40%.
Friday Night 2025-07-18, Chance T-storms then Mostly Cloudy. A chance of showers and thunderstorms. Mostly cloudy, with a low around 67. South wind around 5 mph becoming light and variable in the evening. Chance of precipitation is 30%.
Saturday 2025-07-19, Partly Sunny then Chance Showers. A chance of showers. Partly sunny, with a high near 83. North wind 3 to 6 mph. Chance of precipitation is 30%.