Average Winter Humidity by USA State

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The average humidity during winter 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 winter averages are based on data for the months o fDecember, January and February.

Average relative humidity (%) in winter
State Place Morning Afternoon
Alabama Birmingham 80 54
Alaska Anchorage 75 72
Arizona Tucson 61 30
Arkansas Fort Smith 81 52
California San Diego 71 57
Colorado Grand Junction 75 56
Connecticut Hartford 72 56
Delaware Wilmington 74 57
Florida Tampa 86 56
Georgia Macon 81 51
Hawaii Honolulu 77 60
Idaho Boise 79 64
Illinois Peoria 81 66
Indiana Indianapolis 80 66
Iowa Des Moines 77 63
Kansas Wichita 79 56
Kentucky Louisville 75 59
Louisiana New Orleans 83 61
Maine Portland 74 59
Maryland Baltimore 70 54
Massachusetts Boston 68 58
Michigan Lansing 83 71
Minnesota Minneapolis 75 64
Mississippi Jackson 87 57
Missouri Springfield 78 56
State Place Morning Afternoon
Montana Helena 71 60
Nebraska Lincoln 79 59
Nevada Reno 77 47
New Hampshire Concord 77 58
New Jersey Atlantic City 77 59
New Mexico Albuquerque 69 38
New York Syracuse 77 68
North Carolina Greensboro 77 52
North Dakota Bismarck 76 65
Ohio Columbus 76 64
Oklahoma Oklahoma City 77 51
Oregon Portland 85 73
Pennsylvania Harrisburg 70 56
Rhode Island Providence 71 57
South Carolina Columbia 81 49
South Dakota Huron 77 64
Tennessee Nashville 80 57
Texas Dallas 79 51
Utah Salt Lake City 78 66
Vermont Burlington 74 64
Virginia Richmond 77 53
Washington Seattle 81 73
West Virginia Beckley 78 64
Wisconsin Madison 81 66
Wyoming Lander 68 59
References

National Climatic Data Center. Comparative Climatic Data.

World Data Center for Meteorology. Climate of the World.

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