Standardized Precipitation Index Table

East Central Mountains Climate Division

Pennsylvania, Climate Division 02

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.) 4.66 7.04 14.08 21.55 24.37 27.47 33.18 38.71 46.93 52.72 54.23 58.27 66.48 79.16 105.03 122.04 154.38 206.09 260.35 333.43
Accumulated Precipitation Departure from Normal (in.) 0.91 0.28 3.92 7.6 6.79 6.08 7.5 8.49 11.97 13.41 10.73 10.86 8.94 10.37 10.25 5.83 12.19 16.54 23.53 49.37
Accumulated Precipitation Percent of Average 124 104 139 154 139 128 129 128 134 134 125 123 116 115 111 105 109 109 110 117
Accumulated Precipitation Percentile (non-exceedance) 75.6 59.4 94.1 98.6 95.9 91.7 93.2 93 96.9 97.5 93.9 93.6 88 87.6 82.7 68.9 80.6 83.5 88.3 98.4
Standardized Precipitation Index 0.69 0.24 1.56 2.2 1.75 1.39 1.49 1.47 1.87 1.96 1.54 1.52 1.17 1.15 0.94 0.49 0.86 0.97 1.19 2.15