Groton, CT has a humid continental climate with warm summers and cold winters. Temperatures in the summer tend to average around 80°F and in the winter, temperatures typically range from 24°F to 34°F. Precipitation is fairly common throughout the year with slightly more rainfall during May and June than other months. Snowfall is also commonplace in Groton, especially during January and February when 6-10 inches of snow can accumulate each month.
Groton, Connecticut gets 48 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Groton averages 27 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 204 sunny days per year in Groton. The US average is 205 sunny days.
Groton gets some kind of precipitation, on average, 119 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.
Weather Highlights
Summer High: the July high is around 80 degrees
Winter Low: the January low is 22
Rain: averages 48 inches of rain a year
Snow: averages 27 inches of snow a year