Hartford, CT Climate

Summary Graph

The summary climate graph for Hartford, CT shows a selection of temperature, rainfall and snow minimum, mean and maximum measures over the course of a year. Click on each of the measures in the key to toggle them on and off.

Graph of average and extreme temperature ranges by day for Hartford, CT.


The warmest month in Hartford Brainard, Hartford, Connecticut is July with an average high temperature of 84.7°F. The hottest day on record was July 22 2011 when the temperature hit 102.9°F. During January the overnight temperature drops to an average of 22.5°F with the lowest temperature of -10.8°F being recorded on January 22 1984.

Warmest Days

Warmest Months

Coldest Days

Coldest Months

The warmest days on record are:

22 Jul 2011102.9°F
21 Jul 1991100.9°F
6 Jul 1999100.9°F
6 Jul 2010100.9°F
15 Jul 199599°F

The warmest months on average were:

July 199990.5°F
July 201089.1°F
July 198388.4°F
July 201188.3°F
August 200587.1°F

The coldest days on record are:

22 Jan 1984-10.8°F
27 Jan 1994-6.2°F
15 Jan 1988-5.8°F
24 Jan 2011-4°F
4 Feb 1985-3.8°F

The coldest months on average were:

October 19829.1°F
January 199414.9°F
January 200916°F
January 198516.3°F
January 198416.5°F


The wettest month by average rainfall in Hartford, CT is October with an average of 2.1 inches of rain falling on 5 to 6 days.Although in May it typically rains on more days with 1.4 inches falling in 7 to 8 days. The driest month by average rainfall in Hartford, CT is February with an average of 1.0 inches of rain falling on 4 to 4 days. Although in January it typically rains on less days with 1.1 inches falling in 3 to 4 days

Wettest Days

The wettest days on record are:

15 October 20054.3 inches
9 October 19982.2 inches
2 October 20061.9 inches
2 October 20101.6 inches
13 October 20111.4 inches

Wettest Months

The wettest months on record are:

October 200514.8 inches
September 200811.9 inches
August 201110 inches
June 20069.8 inches
July 20099.8 inches

Driest Months

The driest months on record are:

February 19740 inches
November 19790 inches
December 19790 inches
January 19800 inches
February 19800 inches