Coast Guard anchors

USCG R & D Center Groton


1 Chelsea Street, 
New London, CT 06320 

In Groton, the summers are warm and humid; the winters are very cold, wet, and windy; and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 23°F to 80°F and is rarely below 8°F or above 87°F.

The warm season lasts for 3.4 months, from June 5 to September 19, with an average daily high temperature above 71°F. The hottest day of the year is July 21, with an average high of 80°F and low of 65°F.


The cold season lasts for 3.3 months, from December 6 to March 15, with an average daily high temperature below 46°F. The coldest day of the year is January 30, with an average low of 23°F and high of 37°F.


Groton does not experience significant seasonal variation in the frequency of wet days (i.e., those with greater than 0.04 inches of liquid or liquid-equivalent precipitation). The frequency ranges from 23% to 33%, with an average value of 27%.
Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 33% on May 31.

Gold Star Bridge
Branford House
Cost of Living
In Groton, CT, the overall cost of living index is 109, which is 10% lower than the Connecticut average and 9% higher than the U.S. average. The following categories are used to calculate the overall cost of living index: goods/services (33%), housing (30%), groceries (13%), utilities (10%), transportation (9%) and health care (5%). From the list, it is clear that the categories of goods/services and housing are responsible for the largest portions of the overall cost of living index. As a general rule, everyday goods and services provide an accurate measure of the general cost of goods in any given city. In the case of Groton, CT, the city’s goods and services are 2% lower than the Connecticut average and 18% higher than the U.S. average.

Getting to Know the Area
This part of the country is beautiful all year-round. This particular area of Connecticut is amazing during the summer and fall. With attractions such as the Children’s Museum and the Mystic Aquarium, you can always find something to do without traveling too far. There are amazing old-fashioned ice cream shops as well as great places for hiking, fishing, skating, and plenty of sandy beaches.


Check out these websites for a list of all of the great events going on in the area.  

Northeast Corridor
Groton Congregational Church
Landmark Square