Average Annual Precipitation by State

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.

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.