Standardized Precipitation Index Table

Coastal Climate Division

New Jersey, Climate Division 03

Precipitation Data Table

Time Scale in Months (As of the end of Apr. 2026)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 2.33 4.59 6.84 9.67 12.68 14.36 18.32 21.92 23.82 29.93 32.12 37.96 48.69 55.09 70.18 101.37 126.26 170.34 214.76 269.88
Accumulated Precipitation Departure from Normal (in.) -1.26 -3.06 -4.04 -4.73 -5.54 -7.15 -6.61 -6.47 -9.11 -7.31 -8.63 -6.25 -6.43 -10.75 -18.36 -8.89 -6.76 -7.04 -6.93 3.84
Accumulated Precipitation Percent of Average 65 60 63 67 70 67 73 77 72 80 79 86 88 84 79 92 95 96 97 101
Accumulated Precipitation Percentile (non-exceedance) 18.5 6.9 4.4 4.6 6.1 3.8 7.6 10.9 4.7 10.5 7.6 17 17.6 7.9 2.2 18.4 27.9 30.1 32.8 59.9
Standardized Precipitation Index -0.9 -1.48 -1.7 -1.68 -1.54 -1.77 -1.43 -1.23 -1.68 -1.25 -1.43 -0.95 -0.93 -1.41 -2.02 -0.9 -0.59 -0.52 -0.44 0.25