Best year time to visit Town of Groton

General weather information about Town of Groton

Average annual temperature is 9.0 °C

Absolute maximum temperature: 30.6 °C

Absolute minimum temperature: -25.6 °C

Number of sunny days: 109 days

Number of rainy days: 226 days

Number of snow days: 30 days

* Weather data for Town of Groton United States is based on climate observations for 2026 year

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Absolute maximum temperature (°C)	12.7	15.5	14.2	26.2	29.3	30.6	30.4	26.9	29.8	27.0	13.7	12.8
Average daytime temperature (°C)	2.9	4.8	4.9	15.7	19.0	22.6	26.1	23.1	21.3	15.2	6.8	5.4
Average temperature (°C)	-0.4	-1.3	0.0	8.9	12.2	17.2	20.9	18.3	16.2	11.1	2.5	2.0
Average night temperature (°C)	-3.1	-5.8	-3.9	3.6	6.2	12.6	16.6	14.7	12.3	7.8	-0.6	-0.3
Absolute minimum temperature (°C)	-9.6	-25.6	-11.8	-5.8	-1.3	6.7	12.6	9.4	5.6	-0.2	-6.7	-7.8

The best time to visit Town of Groton during the most sunny months:

The largest precipitation sum in Town of Groton is at

June — 141(mm)

July — 134(mm)

August — 159(mm)

When is the best time to visit Town of Groton?

The historical weather data above shows the warmest, sunniest and driest months to help you choose the best time to visit Town of Groton.

What is the weather like in Town of Groton?

See average temperature, rainfall and daylight hours for Town of Groton by month in the table above.

How many sunny days does Town of Groton have?

The monthly weather statistics above show sunshine and rainfall patterns for Town of Groton throughout the year.