Standardized Precipitation Index Table

Western Plateau Climate Division

New York, Climate Division 01

Precipitation Data Table

Time Scale in Months (As of the end of May 2025)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 5.88 9.56 11.52 14.25 15.6 18.1 21.15 23.15 26.29 31 33.83 38.68 49.21 58.49 77.71 93.59 114.01 161.83 195.28 238.03
Accumulated Precipitation Departure from Normal (in.) 2.31 2.8 2.01 2.56 1.41 1.14 1.21 -0.06 -0.42 0.68 -0.36 0.49 1.52 3.32 1.31 0.22 -0.6 8.98 4.26 8.76
Accumulated Precipitation Percent of Average 165 142 121 122 110 107 106 100 98 102 99 101 103 106 102 100 99 106 102 104
Accumulated Precipitation Percentile (non-exceedance) 92.7 91.2 82.4 85.3 72.7 68.1 67.5 51.2 47.1 58.7 48.3 55.9 63.8 75.2 59 52.3 48.2 80.7 64.4 74.1
Standardized Precipitation Index 1.46 1.35 0.93 1.05 0.6 0.47 0.45 0.03 -0.07 0.22 -0.04 0.15 0.35 0.68 0.23 0.06 -0.05 0.87 0.37 0.65