Average Relative Humidity in May at US Cities





The average humidity in May is listed here for the largest cities in the United States. The tables below give this month's daily averages along with morning and afternoon 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.

For each city, the Daily number gives the average of humidity readings taken every three hours throughout the day. Morning values are recorded between 4 and 6 am local standard time, when usually temperatures are coolest and humidity highest. Afternoon humidity percentages are readings taken between 3 and 5 pm local standard time, when normally the day's temperature peaks and relative humidity reaches its lowest point. All the figures are averages for the years 1961 to 1990.

Average Relative Humidity (%) in May
Daily CityMorn­ing After­noon
67 Atlanta, Georgia 83 50
71 Austin, Texas 88 54
66 Baltimore, Maryland 80 52
70 Birmingham, Alabama 86 51
67 Boston, Massachusetts 77 58
67 Buffalo, New York 79 55
67 Charlotte, North Carolina 83 50
64 Chicago, Illinois 77 51
67 Cincinnati, Ohio 81 52
67 Cleveland, Ohio 80 55
67 Columbus, Ohio 81 52
70 Dallas, Texas 87 53
52 Denver, Colorado 70 38
65 Detroit, Michigan 80 51
63 Hartford, Connecticut 81 47
75 Houston, Texas 91 57
67 Indianapolis, Indiana 81 52
Daily CityMorn­ing After­noon
73 Jacksonville, Florida 90 55
68 Kansas City, Missouri 83 54
21 Las Vegas, Nevada 31 13
74 Los Angeles, California 83 66
67 Louisville, Kentucky 81 52
66 Memphis, Tennessee 81 52
72 Miami, Florida 83 62
69 Milwaukee, Wisconsin 78 58
60 Minneapolis, Minnesota 76 47
70 Nashville, Tennessee 86 52
74 New Orleans, Louisiana 89 58
63 New York, New York 73 52
68 Oklahoma City, Oklahoma 83 51
71 Orlando, Florida 90 50
65 Philadelphia, Pennsylvania 79 52
22 Phoenix, Arizona 35 13
63 Pittsburgh, Pennsylvania 77 50
Daily CityMorn­ing After­noon
69 Portland, Oregon 84 52
67 Providence, Rhode Island 81 54
71 Raleigh, North Carolina 88 51
70 Richmond, Virginia 86 51
67 Rochester, New York 82 53
59 Sacramento, California 81 35
49 Salt Lake City, Utah 65 33
71 San Antonio, Texas 87 53
71 San Diego, California 77 64
71 San Francisco, California 83 59
69 Seattle, Washington 82 54
67 St. Louis, Missouri 82 51
70 Tampa, Florida 87 52
69 Virginia Beach, Virginia 81 56
65 Washington, DC 77 51
Reference

World Data Center for Meteorology. Climate of the World.

US City Humidity
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