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      Elev 100 ft, 42.613 °N 71.575 °W

      Groton, MA

      Groton Station57°
      Updated: 3:30 PM EDT on September 20, 2026 (GMT -4)
      3 minutes ago
      60°
      45°
      57
      Feels Like 57
      Showers in Vicinity
      N
      4
      Higher temperature is expected tomorrow
      50
      50
      575
      90
      50
      7
      0 mph
      50
      50
      50
      50
      50
      50
      Radar · Now
        Hyper-local data from Weather Underground's network of
        400,000+ personal weather stations worldwide
        Tonight
        Sun 09/20
        Low 50°f
         70% Precip. / 0.18 in
        A steady rain this evening. Showers continuing overnight. Low near 50F. Winds light and variable. Chance of rain 70%.
        Tomorrow
        Mon 09/21
        High 67°f
         8% Precip. / 0 in
        Partly cloudy skies. High 67F. Winds NNE at 5 to 10 mph.
        Tomorrow night
        Mon 09/21
        Low 47°f
         3% Precip. / 0 in
        Partly cloudy during the evening followed by cloudy skies overnight. Low 47F. Winds light and variable.
        Hourly Forecast
        Now
        57°
        4PM
        70%
        57°
        5PM
        60%
        57°
        6PM
        64%
        57°
        6:46PM
        Sunset
        7PM
        69%
        56°
        8PM
        69%
        55°
        9PM
        74%
        55°
        10PM
        61%
        55°
        11PM
        68%
        54°
        12AM
        45%
        54°
        1AM
        39%
        53°
        2AM
        53°
        3AM
        53°
        4AM
        53°
        5AM
        52°
        6AM
        52°
        6:32AM
        Sunrise
        7AM
        51°
        8AM
        52°
        9AM
        55°
        10AM
        58°
        11AM
        61°
        12PM
        62°
        1PM
        64°
        2PM
        65°
        3PM
        66°
        Precipitation
        74%
        Rain likely to continue
        Pollen
        None
        Air Quality
        12
        Good
        UV Index
        1
        Low
        Additional Conditions
        1. Pressure 30.02 in
        2. Visibility 4 miles
        3. Clouds Cloudy
        4. Dew Point54°F
        5. Humidity 89%
        6. Rainfall 0.12 in
        7. Snow Depth 0 in
         KFIT Station History
        Almanac for September 20, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 60°F 74°F 93°F 1983
        4. Low 45°F 50°F 27°F 1964
        5. Rain/Snow Depth
        6. Precipitation 0.18 in 3.1 in -
        7. Snow 0 in 0 in -
        Almanac for September 21, 2026
        1. Forecast Average Record
        2. Temperature
        3. High 67°F 73°F 93°F
        4. Low 45°F 49°F 28°F
        Astronomy
        1. Sun Rise Set
        2. Actual Time 6:31 AM 6:47 PM
        3. Civil Twilight 6:03 AM 7:15 PM
        4. Nautical Twilight 5:30 AM 7:48PM
        5. Astronomical Twilight 4:56 AM 8:22 PM
        1. Length of Visible Light 13h 11m
        2. Length of Day 12h 15m
        3. Tomorrow will be 2 minutes 52 seconds shorter
        1. Moon 3:57 PM -
        2. Waxing Gibbous68% of the Moon is Illuminated
        Sep 26
        Full Moon
        Oct 3
        Waning Half Last Qtr
        Oct 10
        New Moon
        Oct 18
        Waxing Half First Qtr
        Precipitation
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