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 Dec. 2020)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 4.49 7.87 12.01 14.66 19.81 23.13 25.88 28.74 31.44 34.66 37.98 41.94 58.9 70.59 99.69 126.84 147.85 203.25 248.06 293.16
Accumulated Precipitation Departure from Normal (in.) 0.67 0.03 0.09 -1.41 -0.36 -1.24 -2.62 -3.61 -4.42 -4.59 -4.29 -3.79 1.2 0.43 8.15 10.87 10.57 20.25 19.45 18.86
Accumulated Precipitation Percent of Average 118 100 101 91 98 95 91 89 88 88 90 92 102 101 109 109 108 111 109 107
Accumulated Precipitation Percentile (non-exceedance) 73 53.9 54.2 33.7 47.6 37.8 25.8 19.7 17 15.4 17.9 21.7 59.6 53.9 87 89 86.8 95.6 91.9 88.4
Standardized Precipitation Index 0.61 0.1 0.11 -0.42 -0.06 -0.31 -0.65 -0.85 -0.95 -1.02 -0.92 -0.78 0.24 0.1 1.12 1.23 1.12 1.7 1.4 1.2