Standardized Precipitation Index Table

Southwestern Mountain Climate Division

Virginia, Climate Division 06

Precipitation Data Table

Time Scale in Months (As of the end of Mar. 2024)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 3.04 6.19 11.3 15.43 17.07 18.51 20.81 25.48 29.6 33.15 37.57 41.71 52.62 62.19 90.13 109.77 132.25 193.95 246.91 308.87
Accumulated Precipitation Departure from Normal (in.) -1.13 -1.45 0.13 0.76 -0.55 -2.11 -3.17 -2.57 -3.28 -3.93 -3.72 -3.25 -3.51 -3.46 0.13 -0.9 -2.74 13.88 21.98 39.1
Accumulated Precipitation Percent of Average 73 81 101 105 97 90 87 91 90 89 91 93 94 95 100 99 98 108 110 114
Accumulated Precipitation Percentile (non-exceedance) 25.1 27.5 55 62.3 45.9 30.2 24.5 30.5 25.3 22.8 26.5 30.3 31.2 33.1 51.9 47.5 41.1 86 93.6 99.2
Standardized Precipitation Index -0.67 -0.6 0.13 0.31 -0.1 -0.52 -0.69 -0.51 -0.66 -0.75 -0.63 -0.51 -0.49 -0.44 0.05 -0.06 -0.23 1.08 1.52 2.43