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	City	Morning	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
59	Fresno, California	71	34
75	Grand Rapids, Michigan	85	61
69	Hartford, Connecticut	83	52
68	Honolulu, Hawaii	74	57
75	Houston, Texas	91	53

Daily	City	Morning	Afternoon
72	Indianapolis, Indiana	84	53
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	City	Morning	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
38	Tucson, Arizona	46	24
66	Tulsa, Oklahoma	82	53
72	Virginia Beach, Virginia	82	59
67	Washington, DC	79	52

Average Relative Humidity in October at US Cities

Reference

More US City Weather Information