Average Fall Humidity by USA State

The average humidity during fall is listed here for each state in the United States. The tables give annual averages for morning and afternoon relative humidity levels.

The Morning humidity values for a state 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.

Since so few weather stations measure humidity, meaningful state-wide averages aren't available. Instead the tables list a place for each state that represents the state's typical humidity levels.

All of the numbers are averages of several decades of weather measurements. The autumn averages are based on data for the months of September, October and November.

Average relative humidity (%) in fall
State	Place	Morning	Afternoon
Alabama	Birmingham	86	52
Alaska	Anchorage	80	68
Arizona	Tucson	55	27
Arkansas	Fort Smith	87	48
California	San Diego	76	63
Colorado	Grand Junction	60	35
Connecticut	Hartford	83	55
Delaware	Wilmington	83	56
Florida	Tampa	89	58
Georgia	Macon	88	50
Hawaii	Honolulu	71	55
Idaho	Boise	67	41
Illinois	Peoria	85	56
Indiana	Indianapolis	85	57
Iowa	Des Moines	79	55
Kansas	Wichita	81	50
Kentucky	Louisville	82	54

State	Place	Morning	Afternoon
Louisiana	New Orleans	87	60
Maine	Portland	85	63
Maryland	Baltimore	81	54
Massachusetts	Boston	78	60
Michigan	Lansing	87	62
Minnesota	Minneapolis	82	56
Mississippi	Jackson	92	52
Missouri	Springfield	83	53
Montana	Helena	73	45
Nebraska	Lincoln	83	52
Nevada	Reno	72	30
New Hampshire	Concord	87	56
New Jersey	Atlantic City	86	61
New Mexico	Albuquerque	64	32
New York	Syracuse	84	63
North Carolina	Greensboro	86	53
North Dakota	Bismarck	81	47

State	Place	Morning	Afternoon
Ohio	Columbus	82	56
Oklahoma	Oklahoma City	81	48
Oregon	Portland	87	60
Pennsylvania	Harrisburg	81	56
Rhode Island	Providence	82	58
South Carolina	Columbia	89	50
South Dakota	Huron	83	50
Tennessee	Nashville	86	52
Texas	Dallas	83	48
Utah	Salt Lake City	68	43
Vermont	Burlington	80	61
Virginia	Richmond	87	53
Washington	Seattle	85	66
West Virginia	Beckley	85	59
Wisconsin	Madison	88	59
Wyoming	Lander	64	43

Average Autumn Humidity by USA State

References

More American State Weather Information