Contiguous U.S. 18-Month Period Ending in May Precipitation
Inches
1901-1929
-99
189705
45.64
1.28
189805
42.95
-1.41
189905
44.36
0.00
190005
42.83
-1.53
190105
44.59
0.23
190205
41.05
-3.31
190305
46.54
2.18
190405
44.34
-0.02
190505
43.40
-0.96
190605
47.51
3.15
190705
47.93
3.57
190805
47.45
3.09
190905
45.64
1.28
191005
42.85
-1.51
191105
38.61
-5.75
191205
44.68
0.32
191305
45.75
1.39
191405
43.58
-0.78
191505
44.36
0.00
191605
47.93
3.57
191705
43.85
-0.51
191805
38.92
-5.44
191905
43.31
-1.05
192005
47.11
2.75
192105
44.85
0.49
192205
45.65
1.29
192305
44.82
0.46
192405
45.08
0.72
192505
39.00
-5.36
192605
40.69
-3.67
192705
45.72
1.36
192805
45.50
1.14
192905
45.81
1.45