I-495 MA weather conditions near Chelmsford, Massachusetts
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Current Weather Conditions
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7 day weather forecast
Current condition: Partly Cloudy 83°F 2025-07-14T13:51:00-04:00
This Afternoon 2025-07-14, Chance T-storms. A chance of showers and thunderstorms. Mostly cloudy, with a high near 86. Southwest wind around 6 mph. Chance of precipitation is 40%.
Tonight 2025-07-14, Chance T-storms then Slight Chance Showers and Patchy Fog. A chance of showers and thunderstorms before 11pm, then a slight chance of showers. Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 70. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.
Tuesday 2025-07-15, Patchy Fog then Sunny. Patchy fog before 8am. Otherwise, mostly cloudy, then gradually becoming sunny and hot, with a high near 90. Heat index values as high as 96. Calm wind becoming southwest 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. Mostly sunny and hot, with a high near 93. Calm wind becoming southwest around 6 mph in the afternoon.
Wednesday Night 2025-07-16, Slight Chance T-storms. A slight chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am, then a slight chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 73. Southwest wind 3 to 6 mph. Chance of precipitation is 20%.
Thursday 2025-07-17, Chance Showers then Chance T-storms. A chance of showers between 9am and 2pm, then a chance of showers and thunderstorms after 2pm. Partly sunny and hot, with a high near 90. Southwest wind 6 to 8 mph. Chance of precipitation is 40%.
Thursday Night 2025-07-17, Chance T-storms then Partly Cloudy. A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 9pm. Partly cloudy, with a low around 75. West wind around 5 mph. Chance of precipitation is 30%.
Friday 2025-07-18, Mostly Sunny then Chance T-storms. A chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 89. West wind 5 to 7 mph. Chance of precipitation is 30%.
Friday Night 2025-07-18, Chance T-storms then Partly Cloudy. A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 66. Light northwest wind. Chance of precipitation is 30%.
Saturday 2025-07-19, Mostly Sunny. Mostly sunny, with a high near 83. Light and variable wind becoming northeast around 5 mph in the afternoon.
Saturday Night 2025-07-19, Partly Cloudy. Partly cloudy, with a low around 65. Light and variable wind.
Sunday 2025-07-20, Partly Sunny then Chance T-storms. A chance of showers and thunderstorms. Partly sunny, with a high near 82. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 30%.
Current condition: Partly Cloudy 83°F 2025-07-14T13:51:00-04:00 
This Afternoon 2025-07-14, Chance T-storms. A chance of showers and thunderstorms. Mostly cloudy, with a high near 86. Southwest wind around 6 mph. Chance of precipitation is 40%.Tonight 2025-07-14, Chance T-storms then Slight Chance Showers and Patchy Fog. A chance of showers and thunderstorms before 11pm, then a slight chance of showers. Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 70. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.
Tuesday 2025-07-15, Patchy Fog then Sunny. Patchy fog before 8am. Otherwise, mostly cloudy, then gradually becoming sunny and hot, with a high near 90. Heat index values as high as 96. Calm wind becoming southwest 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. Mostly sunny and hot, with a high near 93. Calm wind becoming southwest around 6 mph in the afternoon.
Wednesday Night 2025-07-16, Slight Chance T-storms. A slight chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 2am, then a slight chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 73. Southwest wind 3 to 6 mph. Chance of precipitation is 20%.Thursday 2025-07-17, Chance Showers then Chance T-storms. A chance of showers between 9am and 2pm, then a chance of showers and thunderstorms after 2pm. Partly sunny and hot, with a high near 90. Southwest wind 6 to 8 mph. Chance of precipitation is 40%.
Thursday Night 2025-07-17, Chance T-storms then Partly Cloudy. A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 9pm. Partly cloudy, with a low around 75. West wind around 5 mph. Chance of precipitation is 30%.
Friday 2025-07-18, Mostly Sunny then Chance T-storms. A chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 89. West wind 5 to 7 mph. Chance of precipitation is 30%.
Friday Night 2025-07-18, Chance T-storms then Partly Cloudy. A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 66. Light northwest wind. Chance of precipitation is 30%.
Saturday Night 2025-07-19, Partly Cloudy. Partly cloudy, with a low around 65. Light and variable wind.Sunday 2025-07-20, Partly Sunny then Chance T-storms. A chance of showers and thunderstorms. Partly sunny, with a high near 82. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 30%.