Standardized Precipitation Index Table

Central Mountains Climate Division

Pennsylvania, Climate Division 07

Precipitation Data Table

Time Scale in Months (As of the end of May 2025)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 7.3 11.05 13.04 16.34 17.29 20.27 23.17 24.73 27.26 34.07 38.28 41.13 56.12 67.69 92.45 109.31 131.22 181.65 217.33 265.71
Accumulated Precipitation Departure from Normal (in.) 3.19 3.32 1.85 2.57 0.53 0.43 0.21 -1.48 -2.5 0.55 0.51 -0.87 2.94 5.76 8.35 5.32 5.08 13.42 7.06 13.3
Accumulated Precipitation Percent of Average 178 143 117 119 103 102 101 94 92 102 101 98 106 109 110 105 104 108 103 105
Accumulated Precipitation Percentile (non-exceedance) 94.9 92.2 77.8 81.8 59.3 57.4 54.4 37.1 29 56.5 55.7 45.3 70.1 82.2 84.9 74.1 69.8 86.9 70.7 81.8
Standardized Precipitation Index 1.63 1.42 0.77 0.91 0.23 0.19 0.11 -0.33 -0.55 0.16 0.14 -0.12 0.53 0.92 1.03 0.65 0.52 1.12 0.54 0.91