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