Average Autumn 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
References

National Climatic Data Center. Comparative Climatic Data.

World Data Center for Meteorology. Climate of the World.

State Humidity
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