Standardized Precipitation Index Table

Upper Susquehanna Climate Division

Pennsylvania, Climate Division 06

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.) 6.8 10.02 12.29 14.8 15.69 18.59 21.73 23.1 24.77 32.28 36.49 39.73 52.72 64.86 91.56 107.83 129.86 178.7 216.82 260.51
Accumulated Precipitation Departure from Normal (in.) 2.96 2.82 2.11 2.3 0.67 0.76 0.93 -1.03 -3.05 0.6 0.78 0.04 2.87 7.3 12.14 10.59 10.79 19.96 18.49 22.56
Accumulated Precipitation Percent of Average 177 139 121 118 104 104 104 96 89 102 102 100 106 113 115 111 109 113 109 109
Accumulated Precipitation Percentile (non-exceedance) 95.1 89.5 81.3 81.4 61.8 61.8 62.5 41.8 25.1 56.9 57.8 52.1 69.9 87.4 91.7 86.8 82.8 91.9 87.2 88.9
Standardized Precipitation Index 1.66 1.25 0.89 0.89 0.3 0.3 0.32 -0.21 -0.67 0.17 0.2 0.05 0.52 1.14 1.38 1.12 0.95 1.4 1.14 1.22