Monthly Humidity Averages for Connecticut

The humidity averages for each month are listed below for places in Connecticut. The tables give the daily averages along with highest and lowest relative humidity levels.

Relative humidity measures the actual amount of moisture in the air as a percentage of the maximum amount of moisture the air can hold.

All the numbers here are averages for the years 1961 to 1990.

Average Humidity

In this table, the Daily number is the average of humidity readings taken every three hours throughout the day. Morning percentages are for 7 am and Afternoon measures are for 4 pm local standard time.

Average relative humidity (%) for Bridgeport, Connecticut
Daily   Morning Afternoon
66 January 72 60
66 February 72 59
66 March 72 56
64 April 71 54
70 May 76 59
74 June 78 61
73 July 79 61
74 August 80 61
74 September 82 62
70 October 79 60
70 November 77 62
70 December 74 63
70 Annual 76 60
Average relative humidity (%) for Hartford, Connecticut
Daily   Morning Afternoon
64 January 71 55
63 February 72 53
60 March 71 49
58 April 69 44
63 May 73 47
67 June 77 51
68 July 78 51
71 August 83 53
73 September 86 55
69 October 83 52
68 November 78 57
68 December 75 60
66 Annual 76 52

Highest and Lowest Humidity

Below are the monthly and yearly averages for maximum and minimum humidity levels in Connecticut. The hours when a month's highest and lowest humidity readings usually occur are given in local standard time.

Daily high and low relative humidity (%) averages in Bridgeport, Connecticut
High Time   Low Time
71.8 7 pm January 60.2 4 pm
72.1 7 pm February 58.6 4 pm
73.1 4 am March 55.6 4 pm
73.8 4 am April 53.6 4 pm
81.7 4 am May 59.0 4 pm
85.9 4 am June 60.6 4 pm
85.0 4 am July 60.9 1 pm
85.6 4 am August 61.3 4 pm
84.8 4 am September 61.4 1 pm
79.5 4 am October 58.7 1 pm
76.9 7 pm November 60.8 1 pm
74.3 7 pm December 62.0 1 pm
78.5 4 am Annual 59.6 4 pm
Daily high and low relative humidity (%) averages in Hartford, Connecticut
High Time   Low Time
70.7 7 pm January 55.3 4 pm
71.9 7 pm February 52.7 4 pm
70.9 7 pm March 48.5 4 pm
72.7 4 am April 44.3 4 pm
80.9 4 am May 47.0 4 pm
85.1 4 am June 51.2 4 pm
86.3 4 am July 50.6 1 pm
87.3 4 am August 52.8 4 pm
88.0 4 am September 54.1 1 pm
82.9 4 am October 51.4 1 pm
78.1 7 pm November 55.8 1 pm
75.1 7 pm December 58.9 1 pm
78.8 4 am Annual 52.1 1 pm
Reference

World Data Center for Meteorology. Climate of the World.

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