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

Fitchburg, Fitchburg Municipal Airport (KFIT)

Lat: 42.55°NLon: 71.76°WElev: 348ft.

Fair

23°C

73°F

Humidity 84%
Wind Speed E 6 km/h
Barometer 1020.1 mb (30.13 in)
Dewpoint 20°C (68°F)
Visibility 16 km
Last update 12 Jul 10:52 pm EDT
Extended Forecast for

Groton MA

  • Tonight

    Tonight: Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 17. Calm wind.

    Low: 17 °C

    Patchy Fog

  • Sunday

    Sunday: Patchy fog before 8am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 29. Calm wind becoming south 5 to 10 km/h in the afternoon.

    High: 29 °C

    Patchy Fog
    then Mostly
    Sunny

  • Sunday Night

    Sunday Night: 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 18. South wind 3 to 8 km/h. Chance of precipitation is 60%.

    Low: 18 °C

    Mostly Clear
    then Showers
    Likely and
    Patchy Fog

  • Monday

    Monday: Showers likely, with thunderstorms also possible after 2pm. Patchy fog before 7am. Otherwise, mostly cloudy, with a high near 29. Southwest wind 3 to 8 km/h. Chance of precipitation is 60%. New rainfall amounts of less than 1 mm, except higher amounts possible in thunderstorms.

    High: 29 °C

    Showers
    Likely and
    Patchy Fog
    then Chance
    T-storms

  • Monday Night

    Monday Night: A chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and 11pm. Partly cloudy, with a low around 19. Calm wind. Chance of precipitation is 30%.

    Low: 19 °C

    Chance
    T-storms then
    Partly Cloudy

  • Tuesday

    Tuesday: Sunny and hot, with a high near 33. Calm wind.

    High: 33 °C

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 20. Calm wind.

    Low: 20 °C

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 34. Light west wind becoming southwest 6 to 11 km/h in the afternoon.

    High: 34 °C

    Hot

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 22. Southwest wind 5 to 8 km/h.

    Low: 22 °C

    Partly Cloudy

Detailed Forecast

Tonight
Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 17. Calm wind.
Sunday
Patchy fog before 8am. Otherwise, cloudy through mid morning, then gradual clearing, with a high near 29. Calm wind becoming south 5 to 10 km/h in the afternoon.
Sunday Night
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 18. South wind 3 to 8 km/h. Chance of precipitation is 60%.
Monday
Showers likely, with thunderstorms also possible after 2pm. Patchy fog before 7am. Otherwise, mostly cloudy, with a high near 29. Southwest wind 3 to 8 km/h. Chance of precipitation is 60%. New rainfall amounts of less than 1 mm, except higher amounts possible in thunderstorms.
Monday Night
A chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and 11pm. Partly cloudy, with a low around 19. Calm wind. Chance of precipitation is 30%.
Tuesday
Sunny and hot, with a high near 33. Calm wind.
Tuesday Night
Mostly clear, with a low around 20. Calm wind.
Wednesday
Sunny and hot, with a high near 34. Light west wind becoming southwest 6 to 11 km/h in the afternoon.
Wednesday Night
Partly cloudy, with a low around 22. Southwest wind 5 to 8 km/h.
Thursday
A chance of showers after 2pm. Mostly sunny and hot, with a high near 33. Southwest wind 8 to 13 km/h. Chance of precipitation is 30%.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 21. Southwest wind 5 to 10 km/h. Chance of precipitation is 30%.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 30. Southwest wind 8 to 11 km/h. Chance of precipitation is 40%.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 19. Calm wind. Chance of precipitation is 30%.
Saturday
A chance of showers. Partly sunny, with a high near 28. North wind 3 to 8 km/h. Chance of precipitation is 30%.
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ABOUT THIS FORECAST

 
Point Forecast:
Groton MA
 42.6°N 71.58°W (Elev. 299 m)
Last Update:
6:14 pm EDT Jul 12, 2025
Forecast Valid:
11pm EDT Jul 12, 2025-6pm EDT Jul 19, 2025
 
Forecast Discussion
 
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Additional Resources

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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