Standardized Precipitation Index Table

Central Mountains Climate Division

Pennsylvania, Climate Division 07

Precipitation Data Table

Time Scale in Months (As of the end of Jun. 2019)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 6.36 12.89 17.58 19.6 23.21 27.5 31.45 36.66 41.55 50.4 55.01 63.73 78.55 90.06 110.66 135.76 156.44 196.25 237.8 279.09
Accumulated Precipitation Departure from Normal (in.) 2.1 4.54 5.63 4.17 5.22 6.52 7.41 9.49 11.14 16.44 17.34 21.83 24.74 27.23 26.94 31.16 30.91 28.94 28.66 28.07
Accumulated Precipitation Percent of Average 149 154 147 127 129 131 131 135 137 148 146 152 146 143 132 130 125 117 114 111
Accumulated Precipitation Percentile (non-exceedance) 89.2 96.2 96.7 90.8 93.2 96.5 97.5 98.7 99 99.9 99.9 100 100 100 99.9 100 99.8 99.3 98.7 97.8
Standardized Precipitation Index 1.24 1.78 1.84 1.33 1.49 1.82 1.96 2.21 2.35 3.15 3.13 3.52 3.67 3.73 3.14 3.44 2.94 2.47 2.21 2.02