The 10 Most Humid States In The United States For 2023


These states have the most humidity in all of the USA.

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Most Humid States In America Map

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Summary

  • The average relative humidity in in the United States is 55.64 in the afternoon and 77.68 in the morning.

  • Louisiana has the highest average humidity in the United States; The average humidity is 60.25 in the afternoon and 88.25 in the morning.

  • Arizona has the lowest average humidity in the United States; The average humidity is 28.50 in the afternoon and 52.25 in the mooring.

Table Of Contents: Methodology | Table | FAQs | References

The average relative humidity in in the United States is 55.64 in the afternoon and 77.68 in the morning. That’s according to the average reading at the National Oceanic and Atmospheric Administrations (NOAA) most recently available data for all stations.

While humidity varies across the US as you would expect with Southern states generally being the most humid and sun belt states being the least, there were some notable exceptions to the trend. The Midwest actually has surprisingly high humidity with states like Michigan and Iowa scoring as some of the most humid.

We found the most and least humid states. Keep reading to see a breakdown of humidity in all 50 states by morning and afternoon readings.

States With The Least Humidity In The US

  1. Arizona
  2. Nevada
  3. New Mexico
  4. Colorado
  5. Utah
  6. Wyoming
  7. Idaho
  8. California
  9. Montana
  10. Maryland

For more reading, check out:

Methodology

To find the most humid states, we went to the National Oceanic and Atmospheric Administrations’ (NOAA) most recent data set of humidity by weather station. They have over 250 such stations scattered around the United States. We used this data to create a state level humidity metric for each state and then ranked each state based on that metric.

Here’s more detail on how we went from station level data to state level data.

To calculate a state’s average, we took all the stations within that state and averaged two variables:

  • Annual Average Morning Humidity
  • Annual Average Afternoon Humidity

This generated a state level morning and afternoon humidity level. (Note: We used the same methodology across all stations to generate the US average humidity levels mentioned in the summary section.)

Next, we ranked the state level morning readings and the afternoon readings from 1 to 50 with 1 being the most humid.

Finally, we averaged these two rankings to create a state humidity score and used that to rank each state from the most humid to least humid.

You can download the data set here.

Humidity By State

Rank State Afternoon Morning
1 Louisiana 60.25 88.25
2 Michigan 62.00 82.38
3 Iowa 61.25 82.50
4 Florida 58.75 85.58
5 Minnesota 61.60 82.20
6 Wisconsin 61.50 81.75
7 North Dakota 60.25 81.50
8 Missouri 59.00 82.25
9 Mississippi 56.33 88.67
10 Illinois 60.00 82.00
11 Indiana 60.00 82.00
12 West Virginia 57.75 83.50
13 Alaska 69.65 79.00
14 Ohio 60.12 81.12
15 Arkansas 56.50 84.50
16 Alabama 56.00 85.75
17 Tennessee 56.00 83.80
18 Hawaii 61.75 77.50
19 North Carolina 55.83 82.83
20 Kentucky 57.75 81.00
21 Maine 60.00 78.50
22 Georgia 53.17 84.83
23 South Dakota 58.25 79.25
24 Washington 57.83 79.33
25 New York 58.44 76.44
26 Oklahoma 55.50 80.50
27 South Carolina 51.50 82.50
28 Pennsylvania 57.29 78.14
29 Vermont 58.00 76.00
30 Oregon 56.62 78.00
31 Nebraska 54.14 79.86
32 New Hampshire 53.00 80.00
33 Virginia 55.00 78.60
34 Massachusetts 57.00 74.67
35 Texas 52.72 79.83
36 Kansas 53.80 78.60
37 Delaware 55.00 78.00
38 Connecticut 56.00 75.50
39 New Jersey 54.50 76.00
40 Rhode Island 55.00 75.00
41 Maryland 53.00 77.00
42 Montana 49.00 69.71
43 California 49.46 67.77
44 Idaho 45.00 67.00
45 Wyoming 45.75 63.75
46 Utah 43.00 63.00
47 Colorado 39.00 59.20
48 New Mexico 34.00 57.33
49 Nevada 31.60 56.60
50 Arizona 28.50 52.25

State Humidity FAQs

What is the average humidity in the United States?

The average relative in in the United States is 55.64 in the afternoon and 77.68 in the morning.

What is the the most humid state?

The most humid state is Louisiana. Louisiana has an average humidity of 60.25 in the afternoon and 88.25 in the morning.

What is the the least humid state?

The least humid state is Arizona. Arizona has an average humidity of 28.50 in the afternoon and 52.25 in the morning.

What is the humidity in Hawaii?

The humidity in Hawaii is 61.75 in the afternoon and 77.50 in the morning. Hawaii ranks as the #18 most humid state.

What is the humidity in California?

The humidity in California is 49.46 in the afternoon and 67.77 in the morning. California ranks as the #43 most humid state.

What is the humidity in Florida?

The humidity in Florida is 58.75 in the afternoon and 85.58 in the morning. Florida ranks as the #4 most humid state.

References

About Chris Kolmar

Chris Kolmar has been in the real estate business for almost ten years now. He originally worked for Movoto Real Estate as the director of marketing before founding HomeSnacks.

He believes the key to finding the right place to live comes down to looking at the data, reading about things to do, and, most importantly, checking it out yourself before you move.

If you've been looking for a place to live in the past several years, you've probably stumbled upon his writing already.

You can find out more about him on LinkedIn or his website.