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	City	Morning	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
47	Fresno, California	65	27
65	Grand Rapids, Michigan	77	53
63	Hartford, Connecticut	81	47
66	Honolulu, Hawaii	70	54
75	Houston, Texas	91	57

Daily	City	Morning	Afternoon
67	Indianapolis, Indiana	81	52
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	City	Morning	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
22	Tucson, Arizona	30	12
69	Tulsa, Oklahoma	85	58
69	Virginia Beach, Virginia	81	56
65	Washington, DC	77	51

Average Relative Humidity in May at US Cities

Reference

More US City Weather Information