Average Relative Humidity in October at US Cities





The average humidity in October 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 October
Daily CityMorn­ing After­noon
69 Atlanta, Georgia 82 50
67 Austin, Texas 84 47
70 Baltimore, Maryland 82 53
72 Birmingham, Alabama 86 49
69 Boston, Massachusetts 78 59
73 Buffalo, New York 81 61
70 Charlotte, North Carolina 84 50
69 Chicago, Illinois 81 53
69 Cincinnati, Ohio 81 52
71 Cleveland, Ohio 79 59
69 Columbus, Ohio 81 53
66 Dallas, Texas 82 47
49 Denver, Colorado 65 35
72 Detroit, Michigan 83 55
69 Hartford, Connecticut 83 52
75 Houston, Texas 91 53
72 Indianapolis, Indiana 84 53
Daily CityMorn­ing After­noon
79 Jacksonville, Florida 91 62
67 Kansas City, Missouri 80 51
29 Las Vegas, Nevada 38 19
71 Los Angeles, California 78 65
70 Louisville, Kentucky 83 51
66 Memphis, Tennessee 82 48
75 Miami, Florida 85 64
73 Milwaukee, Wisconsin 82 61
68 Minneapolis, Minnesota 81 53
69 Nashville, Tennessee 86 48
75 New Orleans, Louisiana 88 56
66 New York, New York 74 55
64 Oklahoma City, Oklahoma 79 46
75 Orlando, Florida 88 57
71 Philadelphia, Pennsylvania 83 54
37 Phoenix, Arizona 51 23
68 Pittsburgh, Pennsylvania 80 53
Daily CityMorn­ing After­noon
78 Portland, Oregon 90 60
70 Providence, Rhode Island 82 57
73 Raleigh, North Carolina 88 51
74 Richmond, Virginia 89 52
75 Rochester, New York 83 61
63 Sacramento, California 80 38
56 Salt Lake City, Utah 68 41
67 San Antonio, Texas 84 47
69 San Diego, California 76 63
72 San Francisco, California 82 59
79 Seattle, Washington 87 67
69 St. Louis, Missouri 84 51
74 Tampa, Florida 88 56
72 Virginia Beach, Virginia 82 59
67 Washington, DC 79 52
Reference

World Data Center for Meteorology. Climate of the World.

US City Humidity
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