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 Jul. 2020)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 4.15 6.8 10.51 13.57 16.34 19.73 22.08 25.47 28.09 32.81 35.42 39.11 53.86 61.75 90.07 111.82 132.64 181.06 215.97 252.8
Accumulated Precipitation Departure from Normal (in.) 0.3 -1.06 -0.92 -1.03 -1.04 0.18 0.04 0.65 0.28 1.74 0.84 0.95 4.26 4.05 13.76 15.99 18.26 28.63 25.56 24.36
Accumulated Precipitation Percent of Average 108 87 92 93 94 101 100 103 101 106 102 102 109 107 118 117 116 119 113 111
Accumulated Precipitation Percentile (non-exceedance) 63 33.4 39.7 39.2 38.9 54.4 52.5 59.3 54.8 67.8 59.4 60 80.3 78.3 97.6 98 97.9 99.5 98.1 96.3
Standardized Precipitation Index 0.33 -0.43 -0.26 -0.27 -0.28 0.11 0.06 0.23 0.12 0.46 0.24 0.25 0.85 0.78 1.98 2.05 2.03 2.61 2.08 1.79