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 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.) 2.35 3.46 6.73 11.58 13.86 18.27 19.61 25.07 32.14 35.84 38.42 42.25 51.08 60.84 86.73 106.25 126.75 159.62 203.1 241.38
Accumulated Precipitation Departure from Normal (in.) -0.29 -1.54 -0.86 0.98 0.05 0.94 -1.36 0.49 3.83 3.91 3.25 4.13 5.36 5.44 10.56 12.77 12.54 7.41 12.85 13.11
Accumulated Precipitation Percent of Average 89 69 89 109 100 105 94 102 114 112 109 111 112 110 114 114 111 105 107 106
Accumulated Precipitation Percentile (non-exceedance) 44.3 12.1 32.1 70.2 53.2 64.7 35.8 57.3 83.9 83.3 78.3 82.1 86.3 83.3 93.4 94.2 91.4 75.2 83.5 80.7
Standardized Precipitation Index -0.14 -1.17 -0.46 0.53 0.08 0.38 -0.36 0.18 0.99 0.96 0.78 0.92 1.1 0.97 1.51 1.57 1.36 0.68 0.97 0.87