Groton, CT Weather

Groton, CT climate is warm during summer when temperatures tend to be in the 70's and very cold during winter when temperatures tend to be in the 20's.

The warmest month of the year is July with an average maximum temperature of 80.70 degrees Fahrenheit, while the coldest month of the year is January with an average minimum temperature of 20.00 degrees Fahrenheit.

Temperature variations between night and day tend to be fairly limited during summer with a difference that can reach 18 degrees Fahrenheit, and fairly limited during winter with an average difference of 18 degrees Fahrenheit.

The annual average precipitation at Groton is 48.72 Inches. Rainfall in is fairly evenly distributed throughout the year. The wettest month of the year is November with an average rainfall of 4.51 Inches.

Weather Data

Current Conditions

(Updated: 11:56 AM EST MON NOV 23 2009)

Light Rain, 48°F	Humidity: 89%	Dewpoint: 45°F
	Wind Speed: N 5.8 MPH (5 KT)	Heat Index: 48°F
	Barometer: 30.39 in.	Wind Chill: 45°F

Weather Forecast

(Generated: 10:47 AM EST MON NOV 23 2009)

	Hi: 49°F	This afternoon: Showers early...Then intermittent light rain or drizzle. Near steady temperature in the upper 40s. Northeast winds 10 to 15 mph. Chance of rain 80 percent.
	Lo: 45°F
	Hi: 51°F	Tuesday: Cloudy. Light rain or drizzle likely...Mainly in the morning. Highs in the lower 50s. Northeast winds 10 to 15 mph. Chance of rain 60 percent.
	Lo: 39°F
	Hi: 55°F	Wednesday: Sunny in the morning...Then becoming mostly cloudy. Highs in the mid 50s. Northeast winds 5 to 10 mph.
	Lo: 45°F
	Hi: 55°F	Thanksgiving day: Cloudy with a chance of light rain. Highs in the mid 50s. Chance of rain 40 percent.
	Lo: 45°F
	Hi: 51°F	Friday: Cloudy. Rain likely...Mainly in the morning. Highs in the lower 50s. Chance of rain 60 percent.
	Lo: 39°F
	Hi: 45°F	Saturday: Partly sunny with a 30 percent chance of rain showers. Breezy with highs in the mid 40s.
	Lo: 31°F

Moon, Sunrise and Sunset

	Moon Phase: First Quarter Moon	Civil Twilight: 6:15 AM EST	Sunrise: 6:45 AM EST
		Sunset: 4:23 PM EST	Civil Twilight: 4:53 PM EST

Normal Climate

Normal Temperatures

(GROTON Weather station, 2.53 miles from Groton)

Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual
Max °F	37.7	39.4	47.1	56.3	66.3	74.9	80.7	79.6	72.7	62.5	52.7	42.7	59.4
Mean °F	28.9	30.6	38.2	47.2	57.0	65.8	71.8	70.9	63.6	53.0	44.0	34.2	50.4
Min °F	20.0	21.8	29.3	38.1	47.7	56.6	62.9	62.2	54.5	43.4	35.2	25.7	41.5

Normal Precipitation