Relative Humidity in December at US Cities

The average humidity in December 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 December
Daily	City	Morning	Afternoon
68	Atlanta, Georgia	77	54
68	Austin, Texas	80	52
66	Baltimore, Maryland	72	56
71	Birmingham, Alabama	81	56
65	Boston, Massachusetts	70	60
78	Buffalo, New York	80	74
67	Charlotte, North Carolina	77	53
76	Chicago, Illinois	80	68
74	Cincinnati, Ohio	78	65
74	Cleveland, Ohio	77	70
74	Columbus, Ohio	78	67
68	Dallas, Texas	79	51
57	Denver, Colorado	65	51
77	Detroit, Michigan	80	70
84	Fresno, California	88	67
80	Grand Rapids, Michigan	83	74
68	Hartford, Connecticut	74	60
72	Honolulu, Hawaii	78	61
76	Houston, Texas	87	57

Daily	City	Morning	Afternoon
78	Indianapolis, Indiana	82	70
77	Jacksonville, Florida	87	58
71	Kansas City, Missouri	78	60
45	Las Vegas, Nevada	55	32
63	Los Angeles, California	69	60
70	Louisville, Kentucky	75	61
69	Memphis, Tennessee	77	58
73	Miami, Florida	83	60
76	Milwaukee, Wisconsin	80	70
74	Minneapolis, Minnesota	78	67
71	Nashville, Tennessee	81	59
77	New Orleans, Louisiana	86	62
64	New York, New York	69	59
68	Oklahoma City, Oklahoma	78	52
75	Orlando, Florida	87	55
68	Philadelphia, Pennsylvania	74	60
52	Phoenix, Arizona	66	33
72	Pittsburgh, Pennsylvania	76	66

Daily	City	Morning	Afternoon
83	Portland, Oregon	86	78
67	Providence, Rhode Island	73	60
69	Raleigh, North Carolina	78	53
69	Richmond, Virginia	78	55
78	Rochester, New York	80	73
83	Sacramento, California	90	70
74	Salt Lake City, Utah	79	71
68	San Antonio, Texas	80	50
64	San Diego, California	70	58
78	San Francisco, California	85	67
80	Seattle, Washington	82	77
76	St. Louis, Missouri	83	64
75	Tampa, Florida	86	57
50	Tucson, Arizona	56	34
69	Tulsa, Oklahoma	78	59
67	Virginia Beach, Virginia	73	59
64	Washington, DC	70	56

Average Relative Humidity in December at US Cities

Reference

More US City Weather Information