Standardized Precipitation Index Table

Northern Plateau Climate Division

New York, Climate Division 03

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.) 5.05 8.67 12.31 16.6 19.22 23.37 27.14 29.37 31.61 38.77 44.86 51.03 63.14 75.97 106.58 130.95 156.96 212.47 251.77 302.36
Accumulated Precipitation Departure from Normal (in.) 1.21 1.3 1.54 2.81 1.97 2.24 1.99 0.14 -1.74 1.25 3.05 5.07 6.43 8.88 14.69 17.93 19.18 28.85 22.38 27.09
Accumulated Precipitation Percent of Average 132 118 114 120 111 111 108 100 95 103 107 111 111 113 116 116 114 116 110 110
Accumulated Precipitation Percentile (non-exceedance) 79.6 74.5 75.5 85.4 76.2 76.7 71.8 53.3 36.6 62.2 74.1 83.9 87.4 92.3 96.4 97.9 96.8 98.8 93.7 94.7
Standardized Precipitation Index 0.83 0.66 0.69 1.06 0.71 0.73 0.58 0.08 -0.34 0.31 0.65 0.99 1.14 1.43 1.8 2.04 1.85 2.26 1.53 1.61