Standardized Precipitation Index Table

Northwestern Climate Division

West Virginia, Climate Division 01

Precipitation Data Table

Time Scale in Months (As of the end of Jan. 2026)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 2.04 3.86 6.51 9.67 13.09 14.37 20 24.75 30.34 35.57 38.04 42.31 50.04 56.35 77.84 99.67 120.87 170.32 215.33 261.63
Accumulated Precipitation Departure from Normal (in.) -1.35 -2.79 -3.14 -2.86 -2.64 -5.3 -4.25 -3.81 -2.27 -0.68 -2.02 -0.69 -2.75 -6.47 -8.28 -6.3 -8.42 -2.09 -0.11 3.16
Accumulated Precipitation Percent of Average 60 58 67 77 83 73 82 87 93 98 95 98 95 90 90 94 93 99 100 101
Accumulated Precipitation Percentile (non-exceedance) 18.5 7.6 10.2 18.2 24.7 9.1 17.2 22.2 35.2 47.2 37.8 47.3 34.9 19 16.5 26.4 21.5 44.1 50.5 58.8
Standardized Precipitation Index -0.9 -1.43 -1.27 -0.91 -0.68 -1.34 -0.95 -0.76 -0.38 -0.07 -0.31 -0.07 -0.39 -0.88 -0.97 -0.63 -0.79 -0.15 0.01 0.22