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.

Rain Fog/Mist

64°F

18°C

Humidity 96%
Wind Speed N 6 mph
Barometer 29.72 in (1006.5 mb)
Dewpoint 63°F (17°C)
Visibility 2.50 mi
Last update 30 Jul 1:52 am EDT
Extended Forecast for

Groton MA

  • Overnight

    Overnight: Showers, with thunderstorms also possible after 5am. Patchy fog. Low around 58. Northeast wind around 6 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 58 °F

    Showers and
    Patchy Fog

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm, mainly before 2pm, then a chance of showers and thunderstorms after 2pm. Patchy fog. Otherwise, cloudy, with a high near 68. Northeast wind around 8 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    High: 68 °F

    Showers
    Likely and
    Patchy Fog

  • Thursday Night

    Thursday Night: A chance of showers, mainly before 11pm. Patchy fog before 11pm. Otherwise, mostly cloudy, with a low around 57. Light north wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 57 °F

    Chance
    Showers and
    Patchy Fog
    then Mostly
    Cloudy

  • Friday

    Friday: A chance of sprinkles, mainly after 3pm. Partly sunny, with a high near 80. Light north wind.

    High: 80 °F

    Chance
    Sprinkles

  • Friday Night

    Friday Night: A chance of sprinkles, mainly before 7pm. Partly cloudy, with a low around 60. Calm wind.

    Low: 60 °F

    Chance
    Sprinkles

  • Saturday

    Saturday: Mostly sunny, with a high near 83. Light and variable wind.

    High: 83 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 63. Calm wind.

    Low: 63 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 82. Calm wind becoming south 5 to 7 mph in the afternoon.

    High: 82 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A chance of showers. Mostly cloudy, with a low around 62. Light south wind. Chance of precipitation is 40%.

    Low: 62 °F

    Chance
    Showers

Detailed Forecast

Overnight
Showers, with thunderstorms also possible after 5am. Patchy fog. Low around 58. Northeast wind around 6 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Thursday
Showers likely and possibly a thunderstorm, mainly before 2pm, then a chance of showers and thunderstorms after 2pm. Patchy fog. Otherwise, cloudy, with a high near 68. Northeast wind around 8 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night
A chance of showers, mainly before 11pm. Patchy fog before 11pm. Otherwise, mostly cloudy, with a low around 57. Light north wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Friday
A chance of sprinkles, mainly after 3pm. Partly sunny, with a high near 80. Light north wind.
Friday Night
A chance of sprinkles, mainly before 7pm. Partly cloudy, with a low around 60. Calm wind.
Saturday
Mostly sunny, with a high near 83. Light and variable wind.
Saturday Night
Mostly cloudy, with a low around 63. Calm wind.
Sunday
Partly sunny, with a high near 82. Calm wind becoming south 5 to 7 mph in the afternoon.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 62. Light south wind. Chance of precipitation is 40%.
Monday
A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 81. Calm wind becoming southwest around 6 mph in the afternoon. Chance of precipitation is 40%.
Monday Night
A chance of thunderstorms. Partly cloudy, with a low around 59. Calm wind. Chance of precipitation is 30%.
Tuesday
Sunny, with a high near 84. Calm wind becoming northwest around 5 mph in the afternoon.
Tuesday Night
Clear, with a low around 59. Calm wind.
Wednesday
Sunny, with a high near 86. Calm wind becoming southwest around 5 mph in the afternoon.
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ABOUT THIS FORECAST

 
Point Forecast:
Groton MA
 42.6°N 71.58°W (Elev. 299 ft)
Last Update:
2:30 pm EDT Jul 29, 2026
Forecast Valid:
2am EDT Jul 30, 2026-6pm EDT Aug 5, 2026
 
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