Monthly Humidity Averages for New Jersey

The humidity averages for each month are listed below for places in New Jersey. 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 for the month or year 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 Atlantic City, New Jersey
Daily   Morning Afternoon
70 January 77 59
69 February 78 58
67 March 77 55
66 April 76 54
71 May 78 57
73 June 81 58
74 July 83 59
76 August 86 61
76 September 87 61
75 October 87 59
73 November 83 61
71 December 78 61
72 Annual 81 59
Average relative humidity (%) for Newark, New Jersey
Daily   Morning Afternoon
65 January 73 57
63 February 72 54
60 March 69 50
58 April 66 47
62 May 70 50
63 June 70 51
63 July 72 51
66 August 75 54
68 September 78 55
66 October 78 53
67 November 76 57
67 December 74 59
64 Annual 73 53

Highest and Lowest Humidity

Below are the monthly and yearly averages for maximum and minimum humidity levels in New Jersey. 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 Atlantic City, New Jersey
High Time   Low Time
77.3 7 am January 57.8 1 pm
78.4 7 am February 56.5 1 pm
77.5 4 am March 53.3 1 pm
80.0 4 am April 51.3 1 pm
85.5 4 am May 54.8 1 pm
88.7 4 am June 55.7 1 pm
89.1 4 am July 56.8 1 pm
90.1 4 am August 57.5 1 pm
89.2 4 am September 57.8 1 pm
87.5 4 am October 55.0 1 pm
83.2 7 am November 57.0 1 pm
78.4 7 am December 58.4 1 pm
83.4 4 am Annual 56.0 1 pm
Daily high and low relative humidity (%) averages in Newark, New Jersey
High Time   Low Time
72.8 7 am January 57.1 4 pm
71.9 7 am February 54.1 4 pm
68.9 7 am March 49.5 4 pm
68.9 4 am April 46.8 4 pm
75.4 4 am May 50.2 1 pm
76.9 4 am June 51.2 1 pm
77.1 4 am July 51.0 1 pm
79.8 4 am August 52.9 1 pm
81.0 4 am September 54.2 1 pm
78.6 4 am October 52.1 1 pm
76.2 7 am November 55.9 1 pm
74.0 7 am December 58.5 1 pm
74.7 4 am Annual 53.0 1 pm
Reference

World Data Center for Meteorology. Climate of the World.

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