Standardized Precipitation Index Table

St. Lawrence Valley Climate Division

New York, Climate Division 08

Precipitation Data Table

Time Scale in Months (As of the end of Sep. 2020)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 2.21 7.72 10.99 13.05 14.97 16.9 20 22.35 26.08 28.73 31.53 38.73 48.13 60.3 79.18 98.58 118.65 166.07 200.65 237.2
Accumulated Precipitation Departure from Normal (in.) -1.44 0.46 0.05 -1.5 -2.82 -3.83 -3.37 -3.38 -2.24 -2.58 -3.01 0.69 -0.84 1.5 3.15 1.79 4.62 14.08 10.72 9.33
Accumulated Precipitation Percent of Average 60 106 100 90 84 82 86 87 92 92 91 102 98 103 104 102 104 109 106 104
Accumulated Precipitation Percentile (non-exceedance) 15.9 62.7 53.6 30.4 17.2 11.9 16 17 28.5 26.7 24.6 57.5 45.3 61.4 68.4 59.7 69.8 88.9 78.9 73.1
Standardized Precipitation Index -1 0.32 0.09 -0.51 -0.95 -1.18 -0.99 -0.96 -0.57 -0.62 -0.69 0.19 -0.12 0.29 0.48 0.25 0.52 1.22 0.8 0.62