National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Laurence G Hanscom Field Airport (KBED)

Lat: 42.47°NLon: 71.29°WElev: 132ft.

Fair

71°F

22°C

Humidity 84%
Wind Speed S 6 mph
Barometer 30.06 in (1018.9 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 14 Jul 6:51 am EDT
Extended Forecast for

Chelmsford MA

  • Today

    Today: A chance of showers between 1pm and 2pm, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 85. Southwest wind around 6 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 85 °F

    Partly Sunny
    then Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 1am. Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 70. South wind 3 to 5 mph. Chance of precipitation is 30%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 70 °F

    Chance
    T-storms then
    Slight Chance
    Showers and
    Patchy Fog

  • Tuesday

    Tuesday: A slight chance of showers, with thunderstorms also possible after 2pm. Patchy fog before 7am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 89. Heat index values as high as 95. Light southwest wind. Chance of precipitation is 20%.

    High: 89 °F

    Slight Chance
    T-storms and
    Patchy Fog

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 70. Light southwest wind.

    Low: 70 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 92. Calm wind becoming southwest 5 to 7 mph in the afternoon.

    High: 92 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 72. Southwest wind around 6 mph.

    Low: 72 °F

    Mostly Cloudy

  • Thursday

    Thursday: A chance of showers and thunderstorms after 11am. Partly sunny, with a high near 89. Southwest wind 5 to 7 mph. Chance of precipitation is 40%.

    High: 89 °F

    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers before 10pm. Partly cloudy, with a low around 73. Southwest wind 3 to 5 mph. Chance of precipitation is 30%.

    Low: 73 °F

    Chance
    Showers then
    Partly Cloudy

  • Friday

    Friday: A chance of showers between 1pm and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 89. West wind 5 to 7 mph. Chance of precipitation is 40%.

    High: 89 °F

    Mostly Sunny
    then Chance
    T-storms

Detailed Forecast

Today
A chance of showers between 1pm and 2pm, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 85. Southwest wind around 6 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
A chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 1am. Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 70. South wind 3 to 5 mph. Chance of precipitation is 30%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday
A slight chance of showers, with thunderstorms also possible after 2pm. Patchy fog before 7am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 89. Heat index values as high as 95. Light southwest wind. Chance of precipitation is 20%.
Tuesday Night
Mostly clear, with a low around 70. Light southwest wind.
Wednesday
Sunny and hot, with a high near 92. Calm wind becoming southwest 5 to 7 mph in the afternoon.
Wednesday Night
Mostly cloudy, with a low around 72. Southwest wind around 6 mph.
Thursday
A chance of showers and thunderstorms after 11am. Partly sunny, with a high near 89. Southwest wind 5 to 7 mph. Chance of precipitation is 40%.
Thursday Night
A chance of showers before 10pm. Partly cloudy, with a low around 73. Southwest wind 3 to 5 mph. Chance of precipitation is 30%.
Friday
A chance of showers between 1pm and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 89. West wind 5 to 7 mph. Chance of precipitation is 40%.
Friday Night
A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 11pm. Partly cloudy, with a low around 68. Light northwest wind. Chance of precipitation is 30%.
Saturday
Mostly sunny, with a high near 82. North wind around 5 mph becoming east in the afternoon.
Saturday Night
Partly cloudy, with a low around 65. Light and variable wind.
Sunday
Partly sunny, with a high near 83. Calm wind becoming south around 6 mph in the afternoon.
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ABOUT THIS FORECAST

 
Point Forecast:
Chelmsford MA
 42.58°N 71.38°W (Elev. 180 ft)
Last Update:
6:28 am EDT Jul 14, 2025
Forecast Valid:
7am EDT Jul 14, 2025-6pm EDT Jul 20, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation