Annual precipitation, inches, Lake Superior, 1900-1986
#Source: Great Lake Water Levels, U.S. Dept of Commerce, Rockville MD
#        U.S. Lake Survey, Detroit, MI, US Army Corps of Engineers
 28.55
 27.37
 25.60
 29.93
 27.61
 29.04
 27.26
 26.21
 27.71
 27.67
 22.79
 32.20
 25.96
 29.65
 24.67
 29.82
 32.42
 23.99
 27.83
 27.34
 27.07
 27.57
 28.43
 24.90
 27.10
 24.73
 34.67
 30.01
 31.55
 28.07
 26.58
 29.39
 31.51
 30.68
 29.88
 32.54
 26.97
 33.39
 33.46
 29.73
 28.20
 35.27
 31.94
 30.56
 33.55
 31.83
 30.80
 28.72
 27.57
 33.62
 35.68
 35.25
 28.25
 32.35
 29.93
 32.74
 26.30
 28.35
 28.96
 31.73
 30.12
 28.58
 27.19
 25.30
 34.18
 34.24
 30.09
 28.42
 37.96
 27.73
 33.84
 33.45
 32.22
 30.84
 23.85
 29.81
 25.97
 39.93
 30.99
 35.69
 29.59
 28.37
 35.82
 32.27
 29.09
 38.25
 32.77