Standardized Precipitation Index Table

Northwestern Climate Division

West Virginia, Climate Division 01

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.) 5.23 10.46 12.85 17.12 18.76 21.49 24.85 25.7 28.77 31.16 34.59 36.85 50.56 61.28 83.99 102.74 128.22 176.11 215.66 270.64
Accumulated Precipitation Departure from Normal (in.) 1.18 2.77 1.35 2.68 0.92 0.33 0.69 -1.34 -1.46 -3.04 -4.18 -6.23 -4 -3.03 -2.29 -4.7 -1.18 3.62 0.16 12.07
Accumulated Precipitation Percent of Average 129 136 112 119 105 102 103 95 95 91 89 86 93 95 97 96 99 102 100 105
Accumulated Precipitation Percentile (non-exceedance) 79.3 90.4 71.8 81.2 63.2 55.9 59.1 39.3 39.1 27.9 22.3 13.5 27.5 34.4 40.6 31.3 46.6 62.4 51.3 78.2
Standardized Precipitation Index 0.82 1.31 0.58 0.89 0.34 0.15 0.23 -0.27 -0.28 -0.58 -0.76 -1.1 -0.6 -0.4 -0.24 -0.49 -0.08 0.32 0.03 0.78