Average Relative Humidity in March at US Cities





The average humidity in March 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 March
Daily CityMorn­ing After­noon
62 Atlanta, Georgia 74 47
64 Austin, Texas 80 48
59 Baltimore, Maryland 68 47
64 Birmingham, Alabama 79 47
63 Boston, Massachusetts 69 56
73 Buffalo, New York 79 65
62 Charlotte, North Carolina 74 46
70 Chicago, Illinois 79 59
67 Cincinnati, Ohio 75 55
70 Cleveland, Ohio 76 62
65 Columbus, Ohio 72 54
64 Dallas, Texas 79 49
54 Denver, Colorado 68 40
70 Detroit, Michigan 78 59
60 Hartford, Connecticut 70 49
73 Houston, Texas 87 54
70 Indianapolis, Indiana 78 58
Daily CityMorn­ing After­noon
71 Jacksonville, Florida 87 51
67 Kansas City, Missouri 78 54
33 Las Vegas, Nevada 44 21
71 Los Angeles, California 78 65
64 Louisville, Kentucky 73 52
63 Memphis, Tennessee 75 51
70 Miami, Florida 81 57
71 Milwaukee, Wisconsin 79 64
67 Minneapolis, Minnesota 76 58
65 Nashville, Tennessee 79 50
73 New Orleans, Louisiana 85 58
59 New York, New York 64 50
61 Oklahoma City, Oklahoma 75 46
70 Orlando, Florida 88 48
62 Philadelphia, Pennsylvania 71 50
39 Phoenix, Arizona 56 24
64 Pittsburgh, Pennsylvania 72 54
Daily CityMorn­ing After­noon
75 Portland, Oregon 85 59
63 Providence, Rhode Island 72 53
63 Raleigh, North Carolina 77 46
63 Richmond, Virginia 76 46
71 Rochester, New York 78 62
72 Sacramento, California 85 53
60 Salt Lake City, Utah 70 47
63 San Antonio, Texas 79 46
67 San Diego, California 75 59
73 San Francisco, California 81 63
74 Seattle, Washington 82 61
68 St. Louis, Missouri 81 54
72 Tampa, Florida 86 53
65 Virginia Beach, Virginia 74 53
59 Washington, DC 68 47
Reference

World Data Center for Meteorology. Climate of the World.

US City Humidity
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