Summer Rainfall Averages for Every State

The map here shows how the amount of rainfall per month in summer compares across the American states. Below the map are the data it's based on.

Plus there's a ranking of states in summer from wettest to driest.

State-wide averages of monthly precipitation in summer range from a high of 7.13 inches (181 millimetres) in Florida to a low of 0.27 inches (7 millimetres) in California. For the entire United States, excluding Hawaii and Alaska, the average amount of moisture falling as rain and snow is 2.79 inches (71 millimetres).

The precipitation totals are averages for the months of June, July and August. These are based on data collected by weather stations throughout each state during the years 1971 to 2000 and made available by the NOAA National Climatic Data Center of the United States.

Map of USA state average precipitation in summer

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

Average monthly precipitation for each state in summer.
State Inches Milli­metres Rank
Alabama 4.621176
Alaska 2.265739
Arizona 1.383543
Arkansas 3.579130
California 0.27750
Colorado 1.804641
Connecticut 4.2110713
Delaware 4.0710319
Florida 7.131811
Georgia 4.711205
Hawaii 4.2210711
Idaho 1.092846
Illinois 3.9210024
Indiana 4.1110418
Iowa 4.361118
Kansas 3.559032
Kentucky 4.1710615
Louisiana 4.941253
Maine 3.719429
Maryland 3.9710122
Massachusetts 3.899927
Michigan 3.328433
Minnesota 3.909926
Mississippi 4.311099
Missouri 3.9310023
State Inches Milli­metres Rank
Montana 1.804641
Nebraska 3.117935
Nevada 0.591549
New Hampshire 3.9210024
New Jersey 4.2710810
New Mexico 2.055240
New York 3.899927
North Carolina 4.801224
North Dakota 2.686838
Ohio 3.9910120
Oklahoma 3.248234
Oregon 0.872247
Pennsylvania 4.1310516
Rhode Island 3.579130
South Carolina 5.021282
South Dakota 2.706937
Tennessee 4.2210711
Texas 2.716936
Utah 0.852248
Vermont 4.2110713
Virginia 3.9910120
Washington 1.283345
West Virginia 4.371117
Wisconsin 4.1210517
Wyoming 1.313344
State Precipitation
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