Standardized Precipitation Index Table

Southeastern Piedmont Climate Division

Pennsylvania, Climate Division 03

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.) 5.83 7.78 14.23 21.69 24.54 26.42 32.06 35.07 41.48 46.54 47.28 51.43 59.04 71.49 95.75 110.57 140.73 190.56 241.06 310.62
Accumulated Precipitation Departure from Normal (in.) 2.16 1.21 4.36 8.24 7.81 6.26 7.91 6.53 8.42 9.41 6.24 6.73 4.5 6.63 6.35 0.94 6.57 11.66 17.53 42.49
Accumulated Precipitation Percent of Average 159 118 144 161 147 131 133 123 125 125 115 115 108 110 107 101 105 107 108 116
Accumulated Precipitation Percentile (non-exceedance) 91.7 76.4 96.6 99.3 97.8 93.5 95.2 89.4 93.2 93.9 84.8 85.6 75.2 79.5 74.7 54.7 70.8 78.7 84.4 98.1
Standardized Precipitation Index 1.38 0.72 1.83 2.44 2.02 1.51 1.67 1.25 1.49 1.54 1.03 1.06 0.68 0.82 0.66 0.12 0.55 0.8 1.01 2.08