Standardized Precipitation Index Table

Central Mountains Climate Division

Pennsylvania, Climate Division 07

Precipitation Data Table

Time Scale in Months (As of the end of Jul. 2026)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 5.42 9.51 13.62 18.69 23.58 24.59 26.73 29.17 31.69 35.43 38.14 39.66 56.61 65.63 83.36 107.46 131.14 174.48 220.6 260.59
Accumulated Precipitation Departure from Normal (in.) 1.16 1.01 1.01 2.45 3.87 2.31 1.46 0.81 0.22 0.71 -0.13 -2.34 2 1.36 -0.72 1.14 4.95 6.2 10.21 8.07
Accumulated Precipitation Percent of Average 127 112 108 115 120 110 106 103 101 102 100 94 104 102 99 101 104 104 105 103
Accumulated Precipitation Percentile (non-exceedance) 80.3 69.8 66.1 78.6 87.3 74.8 67.2 60.2 53.9 57.9 50.6 33.3 64.2 59.6 47.5 56.2 69.6 70.8 78.4 71.7
Standardized Precipitation Index 0.85 0.52 0.42 0.79 1.14 0.67 0.45 0.26 0.1 0.2 0.01 -0.43 0.36 0.24 -0.06 0.16 0.51 0.55 0.79 0.57