Currently: 58 °F. Clear. (Weather station: Groton / New London Airport, USA). See more current weatherAnnual Weather Averages in Groton
Based on weather reports collected during 1985–2015.
All Year Climate & Weather Averages in Groton
High Temp: 79 °F
Low Temp: 22 °F
Mean Temp: 51 °F
Precipitation: 1.57"
Humidity: 72%
Dew Point: 42 °F
Wind: 8 mph
Pressure: 30.03 "Hg
Visibility: 9 mi
January Climate & Weather Averages in Groton
High Temp: 38 °F
Low Temp: 22 °F
Mean Temp: 30 °F
Precipitation: 1.58"
Humidity: 66%
Dew Point: 21 °F
Wind: 9 mph
Pressure: 30.05 "Hg
Visibility: 9 mi
February Climate & Weather Averages in Groton
High Temp: 39 °F
Low Temp: 23 °F
Mean Temp: 31 °F
Precipitation: 1.33"
Humidity: 65%
Dew Point: 21 °F
Wind: 10 mph
Pressure: 30.04 "Hg
Visibility: 10 mi
March Climate & Weather Averages in Groton
High Temp: 46 °F
Low Temp: 30 °F
Mean Temp: 38 °F
Precipitation: 1.46"
Humidity: 68%
Dew Point: 28 °F
Wind: 9 mph
Pressure: 30.05 "Hg
Visibility: 10 mi
April Climate & Weather Averages in Groton
High Temp: 56 °F
Low Temp: 39 °F
Mean Temp: 47 °F
Precipitation: 1.90"
Humidity: 68%
Dew Point: 37 °F
Wind: 9 mph
Pressure: 30.00 "Hg
Visibility: 10 mi
May Climate & Weather Averages in Groton
High Temp: 65 °F
Low Temp: 48 °F
Mean Temp: 57 °F
Precipitation: 1.58"
Humidity: 74%
Dew Point: 48 °F
Wind: 8 mph
Pressure: 30.00 "Hg
Visibility: 9 mi
June Climate & Weather Averages in Groton
High Temp: 74 °F
Low Temp: 58 °F
Mean Temp: 66 °F
Precipitation: 1.45"
Humidity: 78%
Dew Point: 58 °F
Wind: 7 mph
Pressure: 29.95 "Hg
Visibility: 8 mi
July Climate & Weather Averages in Groton
High Temp: 79 °F
Low Temp: 64 °F
Mean Temp: 72 °F
Precipitation: 1.34"
Humidity: 79%
Dew Point: 64 °F
Wind: 6 mph
Pressure: 29.95 "Hg
Visibility: 8 mi
August Climate & Weather Averages in Groton
High Temp: 78 °F
Low Temp: 63 °F
Mean Temp: 71 °F
Precipitation: 1.39"
Humidity: 78%
Dew Point: 64 °F
Wind: 6 mph
Pressure: 29.99 "Hg
Visibility: 9 mi
September Climate & Weather Averages in Groton
High Temp: 73 °F
Low Temp: 56 °F
Mean Temp: 64 °F
Precipitation: 1.65"
Humidity: 78%
Dew Point: 58 °F
Wind: 7 mph
Pressure: 30.05 "Hg
Visibility: 10 mi
October Climate & Weather Averages in Groton
High Temp: 62 °F
Low Temp: 44 °F
Mean Temp: 53 °F
Precipitation: 1.52"
Humidity: 73%
Dew Point: 46 °F
Wind: 8 mph
Pressure: 30.06 "Hg
Visibility: 10 mi
November Climate & Weather Averages in Groton
High Temp: 53 °F
Low Temp: 36 °F
Mean Temp: 44 °F
Precipitation: 1.73"
Humidity: 69%
Dew Point: 36 °F
Wind: 9 mph
Pressure: 30.09 "Hg
Visibility: 10 mi
December Climate & Weather Averages in Groton
High Temp: 44 °F
Low Temp: 28 °F
Mean Temp: 36 °F
Precipitation: 1.97"
Humidity: 68%
Dew Point: 27 °F
Wind: 9 mph
Pressure: 30.09 "Hg
Visibility: 10 mi