Mean Monthly and Annual Number of Hours with Measurable Precipitation
(*) = Less than 1/2 hour Maximum 1-hour totals are based on data from top of the hour. Maximum 60-minute totals will be greater.
For more information click here on Western States, Alaska or Hawaii and Pacific Islands
NORMALS JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC YEAR
Alaska 1931-60 0.2 3.9 9.6 24.3 38.6 49.7 53.5 50.9 42.5 28.7 12.6 2.2 26.4
1941-70 0.6 3.9 9.7 23.3 38.6 49.5 53.5 50.9 42.6 27.5 12.3 1.5 26.2
1951-80 -0.2 2.2 8.8 22.9 38.5 49.2 53.6 51.3 42.5 26.7 12.3 0.9 25.7
1961-90 1.4 2.6 10.4 22.8 38.8 49.6 54.2 51.4 42.7 26.4 11.1 3.4 26.2
1971-00 1.1 3.1 10.7 23.9 39.5 50.3 54.9 51.8 42.6 26.2 11.2 3.9 26.6
Arizona 1931-60 40.6 44.3 49.8 57.6 65.4 74.3 80.0 77.8 72.7 61.8 49.1 42.7 59.7
1941-70 40.9 44.7 49.1 57.0 65.4 74.0 80.0 77.8 72.4 61.8 49.6 42.2 59.6
1951-80 41.0 44.8 49.2 56.4 64.9 74.6 80.1 77.7 72.1 61.6 49.3 41.9 59.5
1961-90 41.2 45.4 49.8 57.0 65.4 74.9 80.1 77.9 71.8 61.3 49.7 41.9 59.7
1971-00 42.3 46.2 51.0 57.6 66.0 75.5 80.2 78.5 72.6 61.7 49.6 42.5 60.3
California 1931-60 43.3 46.4 50.6 56.3 62.3 68.8 75.2 73.8 69.7 60.9 51.1 45.3 58.6
1941-70 43.6 47.1 50.0 55.6 62.0 68.6 75.0 73.7 69.6 61.0 51.2 44.8 58.5
1951-80 43.9 47.6 50.2 55.1 61.9 69.3 75.1 73.9 69.6 61.2 51.1 44.8 58.6
1961-90 44.4 48.1 50.9 55.7 62.5 69.9 75.2 74.3 69.3 61.3 51.1 44.5 58.9
1971-00 45.1 48.5 51.8 56.5 63.1 70.2 75.3 74.6 69.9 61.6 51.1 45.0 59.4
Colorado 1931-60 23.8 27.3 33.6 43.5 52.9 62.3 68.2 66.6 58.8 48.1 34.1 26.8 45.5
1941-70 23.7 27.4 32.6 43.2 52.9 61.6 67.8 65.9 58.0 47.7 34.3 26.2 45.1
1951-80 23.1 27.4 33.1 42.6 52.6 62.1 67.9 65.6 57.7 47.4 33.7 25.7 44.9
1961-90 22.9 27.4 34.0 43.0 52.4 61.8 67.8 65.5 57.3 46.8 34.2 24.8 44.8
1971-00 23.7 28.3 35.6 43.1 52.5 62.2 67.6 65.7 57.7 46.6 33.5 25.2 45.1
Hawaii 1931-60 -999.9-999.9-999.9-999.9-999.9-999.9-999.9-999.9-999.9-999.9-999.9-999.9 -999.9
1941-70 -999.9-999.9-999.9-999.9-999.9-999.9-999.9-999.9-999.9-999.9-999.9-999.9 -999.9
1951-80 -999.9-999.9-999.9-999.9-999.9-999.9-999.9-999.9-999.9-999.9-999.9-999.9 -999.9
1961-90 67.0 66.9 67.5 68.4 69.8 71.3 72.1 72.7 72.7 72.0 70.2 68.1 69.9
1971-00 67.0 67.0 67.7 68.5 69.7 71.4 72.3 73.0 72.9 72.2 70.4 68.2 70.0
Idaho 1931-60 21.5 26.1 33.0 43.0 51.7 58.3 66.9 64.5 56.3 46.4 32.7 25.8 43.9
1941-70 21.8 27.3 32.4 42.1 51.1 57.8 66.4 64.4 55.9 45.7 33.2 25.2 43.6
1951-80 22.5 27.8 32.7 41.8 51.0 58.7 66.5 64.4 55.9 45.5 32.9 25.2 43.7
1961-90 22.7 27.9 34.4 42.6 51.1 59.4 66.4 65.0 55.6 45.4 33.3 24.0 44.0
1971-00 23.6 28.4 35.9 43.5 51.6 59.3 66.2 65.4 56.1 45.5 32.9 24.3 44.4
Montana 1931-60 16.7 20.7 28.8 41.7 52.2 59.3 67.6 65.3 55.4 45.1 30.3 22.6 42.1
1941-70 16.1 22.3 28.3 41.3 51.4 58.8 66.8 65.2 54.6 44.9 30.4 21.5 41.8
1951-80 15.3 22.9 29.2 40.8 51.5 59.7 66.7 65.0 54.8 44.7 30.0 21.5 41.9
1961-90 17.4 23.7 31.4 41.9 51.8 60.6 66.9 65.4 54.5 44.6 30.2 19.9 42.4
1971-00 18.4 24.4 32.9 42.5 52.2 60.6 66.4 65.6 55.1 44.3 29.7 20.8 42.7
Nevada 1931-60 29.2 33.4 39.8 48.0 56.0 64.2 72.6 70.4 62.4 51.3 38.8 32.1 49.8
1941-70 29.5 34.3 38.7 46.7 55.4 63.2 71.9 69.6 61.7 51.0 38.9 31.3 49.4
1951-80 29.9 34.9 39.0 46.0 55.1 64.1 72.0 69.6 61.5 50.9 38.7 31.1 49.4
1961-90 29.7 34.9 39.8 46.4 55.3 64.5 71.9 69.8 61.0 50.6 38.7 30.5 49.4
1971-00 30.4 35.5 41.2 47.3 55.7 64.8 71.9 70.2 61.6 50.6 38.4 30.9 49.9
New Mexico 1931-60 33.8 37.8 43.5 52.1 60.6 70.0 73.4 71.9 65.5 55.1 42.1 35.5 53.4
1941-70 33.8 37.8 42.8 52.0 60.8 69.5 73.6 71.8 65.2 54.9 42.6 35.2 53.3
1951-80 33.9 37.7 43.3 51.5 60.3 69.7 73.6 71.3 64.8 54.6 42.2 35.0 53.2
1961-90 33.5 37.9 43.9 51.8 60.4 69.3 73.3 71.0 64.4 54.3 42.8 34.8 53.1
1971-00 34.4 38.9 44.9 51.8 60.7 69.7 73.2 71.3 64.8 54.3 42.4 34.9 53.4
Oregon 1931-60 30.8 34.9 40.1 46.7 53.2 58.9 66.0 64.4 58.4 49.6 39.0 34.0 48.0
1941-70 31.0 36.2 39.7 45.7 52.7 58.8 65.8 64.3 58.4 49.2 39.5 33.8 47.9
1951-80 31.7 36.7 39.7 45.2 52.5 59.3 66.0 64.5 58.4 49.2 39.2 33.7 48.0
1961-90 32.0 36.7 40.7 45.6 52.5 59.9 65.8 65.2 58.0 49.1 39.2 32.6 48.1
1971-00 32.6 36.7 41.5 46.4 52.9 59.6 66.0 65.5 58.6 49.2 39.0 32.8 48.4
Utah 1931-60 24.2 29.3 37.2 46.9 55.8 64.3 72.2 70.1 61.8 50.1 35.8 28.0 48.0
1941-70 24.7 30.2 36.6 46.1 55.7 63.7 72.1 69.9 61.3 50.0 36.5 27.7 47.9
1951-80 25.1 30.7 37.1 45.7 55.5 64.7 72.5 69.9 61.2 49.9 36.4 27.2 48.0
1961-90 24.7 30.8 38.1 46.2 55.6 65.2 72.6 70.2 60.9 49.6 36.9 26.7 48.1
1971-00 25.9 31.5 39.7 46.9 55.9 65.6 72.5 70.6 61.5 49.5 36.3 27.3 48.6
Washington 1931-60 29.3 33.6 39.8 47.3 54.4 59.6 65.7 64.4 58.6 49.1 38.0 33.0 47.7
1941-70 29.3 35.1 39.5 46.4 53.8 59.6 65.6 64.4 58.5 48.6 38.3 32.5 47.6
1951-80 29.8 35.5 39.5 46.1 53.5 59.8 65.5 64.6 58.4 48.5 38.1 32.7 47.7
1961-90 30.8 35.8 40.9 46.6 53.5 60.3 65.5 65.4 58.3 48.4 38.4 31.6 48.0
1971-00 31.5 35.8 41.5 47.4 54.1 60.1 65.7 65.8 58.7 48.5 38.3 31.7 48.3
Wyoming 1931-60 18.6 22.1 28.9 40.1 50.1 58.8 66.8 64.8 55.3 44.7 30.0 22.9 41.9
1941-70 18.7 23.1 28.3 39.9 50.0 58.2 66.4 64.7 54.8 44.4 30.4 22.2 41.8
1951-80 18.3 23.5 29.0 39.5 50.1 59.2 66.7 64.4 54.7 44.2 29.7 21.9 41.8
1961-90 18.6 23.3 30.5 40.1 49.9 59.5 66.7 64.4 54.3 43.7 30.0 20.3 41.8
1971-00 19.2 23.7 32.1 40.4 50.0 59.6 66.3 64.7 54.7 43.4 29.2 20.7 42.0