Special Report

States with the Most Rain

Michael Blann / Getty Images

Spring storms that emerged with the receding of winter brought heavy rains across much of the United States. Now, Americans are looking forward to summer — which in some regions is a dry season. No matter where you are in the country, however, there is always the chance of rain.

The United States is home to wildly diverse climates and weather patterns. 24/7 Wall St. examined this geographical variation with a focus on precipitation. For each state, we reviewed yearly average rainfall between 1901 and 2000, as well as 30 year average precipitation levels through 2010 from the government scientific agency National Oceanic and Atmospheric Administration (NOAA). This is the latest period for which such historical data is available.

Some states have distinct wet and dry seasons. In an email to 24/7 Wall St., U.S. Department of Agriculture meteorologist Brad Rippey explained that in California, for example, “The wet season, lasting from late autumn to early spring, is driven by storms associated with the polar jet stream, sometimes supplemented by subtropical moisture (atmospheric rivers or ‘pineapple express’).”

California and several southwestern states, during this part of the year have Mediterranean climates, characterized by sometimes exceedingly dry summers, Rippey said. These states are home to some of the hottest places in the country (click here to see the hottest city in every state).

Elsewhere, such as on the Plains, where moisture from the Gulf of Mexico is pulled into the region, or in near-tropical states like Florida, precipitation peaks during the warm season. The Plains region and Florida are each home to many of the cities with the best weather.

Peak precipitation occurs at different months in different states. In 34 states, the rainiest months are the summer months of May, June, and July. March is the rainiest month in the New England states of Massachusetts, New Jersey, and Rhode Island, as well as in Alabama — one of the rainiest states in the nation. In eight states, late fall and winter months record peak rainfall.

Click here to see the states with the most rain.

To identify the states with the most rain, 24/7 Wall St. reviewed for each state average yearly precipitation from 1901 to 2000 using the Climate-at-a-Glance feature of the National Centers for Environmental Information produced by the National Oceanic and Atmospheric Administration (NOAA). We also reviewed for each state average monthly rainfall based on precipitation data collected from 1981 through 2010, also from NOAA. 100 years of data were not available for Hawaii, so its ranking is based on the average yearly rainfall over the 30 years through 2010.

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50. Nevada
> Average yearly rainfall: 10.3 inches
> Average monthly rainfall: 0.7 inches
> Rainiest time of year: 0.9 inches in January

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mdesigner125 / Getty Images

49. Arizona
> Average yearly rainfall: 12.6 inches
> Average monthly rainfall: 0.9 inches
> Rainiest time of year: 1.7 inches in August

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23155134@N06 / Flickr

48. Utah
> Average yearly rainfall: 13.6 inches
> Average monthly rainfall: 1.1 inches
> Rainiest time of year: 1.5 inches in April

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wolfgangstaudt / Flickr

47. New Mexico
> Average yearly rainfall: 14.0 inches
> Average monthly rainfall: 1.1 inches
> Rainiest time of year: 2.2 inches in August

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ablokhin / Getty Images

46. Wyoming
> Average yearly rainfall: 15.9 inches
> Average monthly rainfall: 1.2 inches
> Rainiest time of year: 2.1 inches in May

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dlerick / Getty Images

45. North Dakota
> Average yearly rainfall: 17.3 inches
> Average monthly rainfall: 1.6 inches
> Rainiest time of year: 3.3 inches in June

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milehightraveler / Getty Images

44. Colorado
> Average yearly rainfall: 18.1 inches
> Average monthly rainfall: 1.0 inches
> Rainiest time of year: 1.9 inches in August

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cgbaldauf / Getty Images

43. Montana
> Average yearly rainfall: 18.7 inches
> Average monthly rainfall: 1.1 inches
> Rainiest time of year: 2.3 inches in June

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25048019@N03 / Flickr

42. South Dakota
> Average yearly rainfall: 19.1 inches
> Average monthly rainfall: 1.8 inches
> Rainiest time of year: 3.5 inches in June

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Bill Chizek / Getty Images

41. California
> Average yearly rainfall: 22.4 inches
> Average monthly rainfall: 1.6 inches
> Rainiest time of year: 3.8 inches in February

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DarcyMaulsby / Getty Images

40. Nebraska
> Average yearly rainfall: 22.6 inches
> Average monthly rainfall: 2.1 inches
> Rainiest time of year: 3.9 inches in May

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Charles Knowles from Meridian Idaho, USA / Wikimedia Commons

39. Idaho
> Average yearly rainfall: 23.9 inches
> Average monthly rainfall: 1.0 inches
> Rainiest time of year: 1.5 inches in May

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rasilja / Getty Images

38. Minnesota
> Average yearly rainfall: 26.0 inches
> Average monthly rainfall: 2.4 inches
> Rainiest time of year: 4.3 inches in June

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Ks0stm / Wikimedia Commons

37. Kansas
> Average yearly rainfall: 27.1 inches
> Average monthly rainfall: 2.3 inches
> Rainiest time of year: 4.3 inches in June

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mpk / Flickr

36. Texas
> Average yearly rainfall: 27.1 inches
> Average monthly rainfall: 2.5 inches
> Rainiest time of year: 3.6 inches in June

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collins_family / Flickr

35. Michigan
> Average yearly rainfall: 31.1 inches
> Average monthly rainfall: 2.6 inches
> Rainiest time of year: 3.5 inches in September

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Jason_Ray_Photography / Getty Images

34. Wisconsin
> Average yearly rainfall: 31.3 inches
> Average monthly rainfall: 2.7 inches
> Rainiest time of year: 4.2 inches in June

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DarcyMaulsby / Getty Images

33. Iowa
> Average yearly rainfall: 32.1 inches
> Average monthly rainfall: 2.8 inches
> Rainiest time of year: 4.5 inches in June

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Visitor7 / Wikimedia Commons

32. Oregon
> Average yearly rainfall: 32.2 inches
> Average monthly rainfall: 2.8 inches
> Rainiest time of year: 5.5 inches in December

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Monilu / Getty Images

31. Oklahoma
> Average yearly rainfall: 33.8 inches
> Average monthly rainfall: 3.3 inches
> Rainiest time of year: 5.2 inches in May

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A&J Fotos / Getty Images

30. Alaska
> Average yearly rainfall: 36.7 inches
> Average monthly rainfall: 3.1 inches
> Rainiest time of year: 4.7 inches in September

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christopherarndt / Getty Images

29. Illinois
> Average yearly rainfall: 37.5 inches
> Average monthly rainfall: 3.1 inches
> Rainiest time of year: 4.1 inches in May

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ChrisBoswell / Getty Images

28. Ohio
> Average yearly rainfall: 38.3 inches
> Average monthly rainfall: 3.3 inches
> Rainiest time of year: 4.2 inches in May

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alexeys / Getty Images

27. Indiana
> Average yearly rainfall: 39.7 inches
> Average monthly rainfall: 3.4 inches
> Rainiest time of year: 4.7 inches in May

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FilippoBacci / Getty Images

26. New York
> Average yearly rainfall: 40.3 inches
> Average monthly rainfall: 3.5 inches
> Rainiest time of year: 3.9 inches in June

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peeterv / Getty Images

25. Missouri
> Average yearly rainfall: 40.5 inches
> Average monthly rainfall: 3.5 inches
> Rainiest time of year: 5.0 inches in May

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Toa55 / Getty Images

24. Vermont
> Average yearly rainfall: 41.7 inches
> Average monthly rainfall: 3.1 inches
> Rainiest time of year: 4.2 inches in July

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DenisTangneyJr / Getty Images

23. Massachusetts
> Average yearly rainfall: 42.0 inches
> Average monthly rainfall: 4.0 inches
> Rainiest time of year: 4.7 inches in March

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Jay_Arbelo / Getty Images

22. Maine
> Average yearly rainfall: 42.0 inches
> Average monthly rainfall: 3.6 inches
> Rainiest time of year: 4.3 inches in November

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IgorBukhlin / Getty Images

21. Pennsylvania
> Average yearly rainfall: 42.0 inches
> Average monthly rainfall: 3.4 inches
> Rainiest time of year: 4.3 inches in July

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Kgrr / Wikimedia Commons

20. Washington
> Average yearly rainfall: 42.0 inches
> Average monthly rainfall: 3.2 inches
> Rainiest time of year: 6.1 inches in November

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OnickzArtworks / Getty Images

19. Maryland
> Average yearly rainfall: 42.6 inches
> Average monthly rainfall: 3.5 inches
> Rainiest time of year: 4.1 inches in July

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stanley45 / Getty Images

18. Virginia
> Average yearly rainfall: 42.9 inches
> Average monthly rainfall: 3.6 inches
> Rainiest time of year: 4.5 inches in July

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danlogan / Getty Images

17. New Hampshire
> Average yearly rainfall: 43.5 inches
> Average monthly rainfall: 5.7 inches
> Rainiest time of year: 6.8 inches in November

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mdgmorris / Getty Images

16. Delaware
> Average yearly rainfall: 43.5 inches
> Average monthly rainfall: 3.6 inches
> Rainiest time of year: 4.6 inches in July

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McIninch / Getty Images

15. West Virginia
> Average yearly rainfall: 44.7 inches
> Average monthly rainfall: 3.6 inches
> Rainiest time of year: 5.0 inches in July

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AlbertPego / Getty Images

14. New Jersey
> Average yearly rainfall: 45.0 inches
> Average monthly rainfall: 3.6 inches
> Rainiest time of year: 4.1 inches in March

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CharlieTurchetta / Getty Images

13. Rhode Island
> Average yearly rainfall: 45.2 inches
> Average monthly rainfall: 3.9 inches
> Rainiest time of year: 5.0 inches in March

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Alexander Farnsworth / Getty Images

12. Connecticut
> Average yearly rainfall: 46.9 inches
> Average monthly rainfall: 3.6 inches
> Rainiest time of year: 4.0 inches in April

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Jason M. Hazard / Getty Images

11. Kentucky
> Average yearly rainfall: 46.9 inches
> Average monthly rainfall: 3.9 inches
> Rainiest time of year: 5.1 inches in May

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Public Domain / Wikimedia Commons

10. South Carolina
> Average yearly rainfall: 48.0 inches
> Average monthly rainfall: 3.9 inches
> Rainiest time of year: 5.9 inches in August

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9. North Carolina
> Average yearly rainfall: 49.3 inches
> Average monthly rainfall: 4.0 inches
> Rainiest time of year: 5.2 inches in August

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danthi66 / Getty Images

8. Arkansas
> Average yearly rainfall: 49.6 inches
> Average monthly rainfall: 4.0 inches
> Rainiest time of year: 5.1 inches in May

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wdhackett / Getty Images

7. Georgia
> Average yearly rainfall: 50.1 inches
> Average monthly rainfall: 3.9 inches
> Rainiest time of year: 5.1 inches in July

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Brian Stansberry / Wikimedia Commons

6. Tennessee
> Average yearly rainfall: 51.6 inches
> Average monthly rainfall: 4.1 inches
> Rainiest time of year: 4.8 inches in July

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Juanmonino / Getty Images

5. Florida
> Average yearly rainfall: 53.7 inches
> Average monthly rainfall: 4.5 inches
> Rainiest time of year: 7.5 inches in August

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KuntalSaha / Getty Images

4. Alabama
> Average yearly rainfall: 55.3 inches
> Average monthly rainfall: 4.7 inches
> Rainiest time of year: 5.7 inches in March

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whusband / Getty Images

3. Mississippi
> Average yearly rainfall: 55.5 inches
> Average monthly rainfall: 4.6 inches
> Rainiest time of year: 5.5 inches in December

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2. Louisiana
> Average yearly rainfall: 56.9 inches
> Average monthly rainfall: 4.8 inches
> Rainiest time of year: 6.6 inches in June

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CAG Photography / Getty Images

1. Hawaii
> Average yearly rainfall: 57.2 inches
> Average monthly rainfall: 4.8 inches
> Rainiest time of year: 7.7 inches in December

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