Average Annual Precipitation by State

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How much precipitation each state in the US gets on average in a year is listed below. The states are also ranked from the wettest state at number 1, to the driest state at number 50.

Below the tables there's a map that allows you to visually compare the annual average precipitation totals among states.

State-wide averages of annual rainfall plus snowfall range from a high of 63.7 inches (1618 millimetres) in Hawaii to a low of 9.5 inches (241 millimetres) in Nevada. For the entire United States, excluding Hawaii and Alaska, the average amount of moisture falling as rain and snow is 30.21 inches (767 millimetres).

The precipitation averages are based on data collected by weather stations throughout each state from 1971 to 2000 and provided by the NOAA National Climatic Data Center.

State names are linked to more detailed rain and snow information for that state.

Average total yearly precipitation for each state.
State Inches Millimetres Rank
Alabama58.314804
Alaska22.557239
Arizona13.634547
Arkansas50.612848
California22.256340
Colorado15.940544
Connecticut50.312799
Delaware45.7116016
Florida54.513855
Georgia50.712877
Hawaii63.716181
Idaho18.948142
Illinois39.299627
Indiana41.7106026
Iowa34.086431
Kansas28.973335
Kentucky48.9124212
Louisiana60.115282
Maine42.2107223
Maryland44.5113118
Massachusetts47.7121114
Michigan32.883332
Minnesota27.369337
Mississippi59.014993
Missouri42.2107124
State Inches Millimetres Rank
Montana15.339045
Nebraska23.659938
Nevada9.524150
New Hampshire43.4110320
New Jersey47.1119615
New Mexico14.637046
New York41.8106225
North Carolina50.312799
North Dakota17.845243
Ohio39.199328
Oklahoma36.592730
Oregon27.469536
Pennsylvania42.9108921
Rhode Island47.9121813
South Carolina49.8126411
South Dakota20.151141
Tennessee54.213766
Texas28.973434
Utah12.231049
Vermont42.7108522
Virginia44.3112519
Washington38.497629
West Virginia45.2114717
Wisconsin32.682933
Wyoming12.932848
USA map of annual average state precipitation
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