Relative Humidity in August at US Cities

The average humidity in August 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 August
Daily	City	Morning	Afternoon
75	Atlanta, Georgia	89	57
64	Austin, Texas	87	42
71	Baltimore, Maryland	85	55
75	Birmingham, Alabama	89	56
71	Boston, Massachusetts	82	61
72	Buffalo, New York	86	57
74	Charlotte, North Carolina	88	55
71	Chicago, Illinois	85	55
72	Cincinnati, Ohio	87	54
73	Cleveland, Ohio	86	59
73	Columbus, Ohio	88	55
60	Dallas, Texas	80	41
49	Denver, Colorado	69	35
72	Detroit, Michigan	87	54
45	Fresno, California	60	22
73	Grand Rapids, Michigan	87	58
71	Hartford, Connecticut	87	53
64	Honolulu, Hawaii	71	52
75	Houston, Texas	93	55

Daily	City	Morning	Afternoon
75	Indianapolis, Indiana	90	57
80	Jacksonville, Florida	93	67
70	Kansas City, Missouri	86	54
26	Las Vegas, Nevada	35	17
77	Los Angeles, California	85	68
72	Louisville, Kentucky	86	54
70	Memphis, Tennessee	85	54
76	Miami, Florida	86	67
75	Milwaukee, Wisconsin	87	62
68	Minneapolis, Minnesota	83	52
73	Nashville, Tennessee	90	54
79	New Orleans, Louisiana	92	66
66	New York, New York	77	54
62	Oklahoma City, Oklahoma	80	43
79	Orlando, Florida	93	66
70	Philadelphia, Pennsylvania	84	55
36	Phoenix, Arizona	51	23
71	Pittsburgh, Pennsylvania	86	54

Daily	City	Morning	Afternoon
65	Portland, Oregon	82	44
73	Providence, Rhode Island	86	59
78	Raleigh, North Carolina	93	59
77	Richmond, Virginia	92	58
74	Rochester, New York	89	57
56	Sacramento, California	78	29
39	Salt Lake City, Utah	54	23
65	San Antonio, Texas	86	44
74	San Diego, California	81	66
75	San Francisco, California	86	61
68	Seattle, Washington	83	50
70	St. Louis, Missouri	88	52
78	Tampa, Florida	90	66
47	Tucson, Arizona	58	32
65	Tulsa, Oklahoma	83	53
75	Virginia Beach, Virginia	87	63
69	Washington, DC	83	55

Average Relative Humidity in August at US Cities

Reference

More US City Weather Information