Standardized Precipitation Index Table

Southern Climate Division

West Virginia, Climate Division 05

Precipitation Data Table

Time Scale in Months (As of the end of Jul. 2020)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 4.27 9.83 16.43 23.66 28.41 34.89 37.95 41.73 44.37 49.71 50.03 52.79 66.19 80.32 112.37 141.09 156.28 202.49 250.04 300.61
Accumulated Precipitation Departure from Normal (in.) -0.43 0.98 3.45 7.03 7.79 11.12 10.8 11.28 11.11 13.58 10.79 9.65 10.1 13.51 26.11 31.19 27.02 30.18 34.73 42.28
Accumulated Precipitation Percent of Average 91 111 127 142 138 147 140 137 133 138 128 122 118 120 130 128 121 118 116 116
Accumulated Precipitation Percentile (non-exceedance) 41 70.7 88.5 97.7 97.8 99.4 99 98.9 98.7 99.2 96.6 94.3 92.7 96.3 99.8 99.9 99.3 99.3 99.4 99.7
Standardized Precipitation Index -0.23 0.55 1.2 1.99 2.01 2.51 2.34 2.28 2.22 2.42 1.82 1.58 1.46 1.79 2.86 3.02 2.48 2.44 2.54 2.8