Standardized Precipitation Index Table

Southern Climate Division

New Jersey, Climate Division 02

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.) 4.38 10.47 17.76 20.9 23.13 27.17 31.19 34.16 36.71 42.43 44.01 49.16 59.8 74.24 105.09 135.99 158.3 203.82 248.17 295.25
Accumulated Precipitation Departure from Normal (in.) 0.82 2.3 5.05 4.45 3.08 3.51 3.59 3.45 2.56 4.48 2.78 4.54 2.51 5.98 15.86 23.14 24.55 25.62 25.59 28.24
Accumulated Precipitation Percent of Average 123 128 140 127 115 115 113 111 107 112 107 110 104 109 118 121 118 114 111 111
Accumulated Precipitation Percentile (non-exceedance) 71.7 79.2 91.2 87.4 77.7 79.7 79.1 77.1 70.7 79.8 69.1 76.3 65.1 78.1 95.1 98.3 98.2 97.5 96.1 96
Standardized Precipitation Index 0.57 0.81 1.35 1.15 0.76 0.83 0.81 0.74 0.54 0.83 0.5 0.72 0.39 0.78 1.65 2.12 2.1 1.96 1.77 1.75