Standardized Precipitation Index Table

Coastal Climate Division

New York, Climate Division 04

Precipitation Data Table

Time Scale in Months (As of the end of Mar. 2024)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 9.02 10.96 17.39 24.97 27.04 29.93 37.39 42.88 48.35 50.14 52.01 56.67 66.38 78.7 94.74 113.23 140.6 184.15 233.3 291.28
Accumulated Precipitation Departure from Normal (in.) 4.81 3.38 6.21 9.79 8.15 7.38 11.21 12.66 14.45 12.8 10.94 11.73 10.31 11.26 4.94 0.85 5.81 4.46 8.83 22.03
Accumulated Precipitation Percent of Average 214 145 156 164 143 133 143 142 143 134 127 126 118 117 105 101 104 102 104 108
Accumulated Precipitation Percentile (non-exceedance) 98.4 92.1 98.2 99.5 97.6 94.7 98.5 98.7 99.2 98.1 95.6 95.7 93 91.2 70.7 54.5 69.9 64 73 91.2
Standardized Precipitation Index 2.16 1.41 2.1 2.57 1.97 1.62 2.18 2.24 2.4 2.09 1.71 1.71 1.47 1.35 0.55 0.11 0.52 0.36 0.61 1.35