average temperature groton ma
The highest average temperature in Groton is July at 73.6 degrees. The coldest average temperature in Groton is January at 26.6 degrees. The most monthly precipitation in Groton occurs in July with 4.3 inches. The Groton weather information is based on the average of the previous 3-7 years of data.he Groton, MA pollution index is the sum of the most hazardous air pollutants displayed in pounds. The Groton, MA pollution index is 39.3% less than the Massachusetts average and 49% greater than the national average.