Monthly Humidity Averages for Maryland





The humidity averages for each month are listed below for Baltimore, Maryland. 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 Baltimore, Maryland
Daily   Morning Afternoon
63 January 70 54
61 February 70 52
59 March 71 47
59 April 71 46
66 May 77 52
68 June 79 53
69 July 81 53
71 August 83 55
71 September 84 54
70 October 82 53
67 November 77 54
66 December 73 56
66 Annual 76 52

Highest and Lowest Humidity

Below are the monthly and yearly averages for maximum and minimum humidity levels in Maryland. 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 Baltimore, Maryland
High Time   Low Time
70.0 7 am January 54.2 4 pm
69.5 7 am February 51.6 4 pm
70.5 7 am March 47.4 4 pm
70.9 4 am April 46.2 4 pm
80.1 4 am May 51.8 4 pm
83.9 4 am June 52.5 1 pm
84.0 4 am July 52.8 4 pm
84.7 4 am August 54.6 4 pm
84.6 4 am September 54.4 4 pm
82.4 7 am October 52.7 4 pm
77.1 7 am November 54.1 4 pm
72.7 7 am December 56.1 4 pm
76.9 4 am Annual 52.4 4 pm
Reference

World Data Center for Meteorology. Climate of the World.

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