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

Autumn Temperatures for Eastern Third of the Country; Super Typhoon Approaching Guam

Cooler and less humid conditions for the eastern third of the nation as a cold slides off the east coast. Combination of dry and breezy conditions may result in spread of wildfires across the lower Mississippi Valley. In addition, fire weather conditions linger into portions of Southern California. For Guam, a super typhoon is approaching. Read More >

Current conditions at

Fitchburg, Fitchburg Municipal Airport (KFIT)

Lat: 42.55°NLon: 71.76°WElev: 348ft.

Fair

28°F

-2°C

Humidity 96%
Wind Speed Calm
Barometer 30.50 in (1033.3 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Last update 18 Oct 4:52 am EDT
Extended Forecast for

Groton MA

  • Today

    Today: Areas of frost before 10am. Otherwise, sunny, with a high near 55. Light and variable wind.

    High: 55 °F

    Areas Frost
    then Sunny

  • Tonight

    Tonight: Patchy frost after 2am. Otherwise, clear, with a low around 32. Calm wind.

    Low: 32 °F

    Clear then
    Patchy Frost

  • Monday

    Monday: Patchy frost before 9am. Otherwise, increasing clouds, with a high near 59. Light and variable wind.

    High: 59 °F

    Patchy Frost
    then Mostly
    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 39. Light north wind.

    Low: 39 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 62. Northeast wind 6 to 8 mph, with gusts as high as 20 mph.

    High: 62 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 37. North wind 3 to 5 mph.

    Low: 37 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 55. Northeast wind around 8 mph.

    High: 55 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 37. Light north wind.

    Low: 37 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 61. North wind around 6 mph.

    High: 61 °F

    Mostly Sunny

Detailed Forecast

Today
Areas of frost before 10am. Otherwise, sunny, with a high near 55. Light and variable wind.
Tonight
Patchy frost after 2am. Otherwise, clear, with a low around 32. Calm wind.
Monday
Patchy frost before 9am. Otherwise, increasing clouds, with a high near 59. Light and variable wind.
Monday Night
Mostly cloudy, with a low around 39. Light north wind.
Tuesday
Partly sunny, with a high near 62. Northeast wind 6 to 8 mph, with gusts as high as 20 mph.
Tuesday Night
Partly cloudy, with a low around 37. North wind 3 to 5 mph.
Wednesday
Mostly sunny, with a high near 55. Northeast wind around 8 mph.
Wednesday Night
Partly cloudy, with a low around 37. Light north wind.
Thursday
Mostly sunny, with a high near 61. North wind around 6 mph.
Thursday Night
Mostly clear, with a low around 40. North wind 3 to 5 mph.
Friday
Sunny, with a high near 55. North wind around 8 mph.
Friday Night
Partly cloudy, with a low around 38. Light north wind.
Saturday
Mostly sunny, with a high near 55. North wind around 6 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Groton MA
 42.6°N 71.58°W (Elev. 299 ft)
Last Update:
4:51 am EDT Oct 18, 2026
Forecast Valid:
5am EDT Oct 18, 2026-6pm EDT Oct 24, 2026
 
Forecast Discussion
 
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Additional Resources

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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