Standardized Precipitation Index Table

Appalachian Mountain Climate Division

Alabama, Climate Division 02

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.) 5.77 10.33 17.21 22.37 24.3 24.79 25.88 31.8 36.97 40.46 43.74 49.44 67.52 81.23 107.08 141.34 177.86 243.4 313.21 382.68
Accumulated Precipitation Departure from Normal (in.) -0.4 -1.05 0.48 0.24 -1.9 -4.64 -7.13 -5.32 -5.08 -5.86 -6.92 -6.19 -4.84 -3.94 -4.3 0.39 10.69 20.41 34.51 48.32
Accumulated Precipitation Percent of Average 94 91 103 101 93 84 78 86 88 87 86 89 93 95 96 100 106 109 112 114
Accumulated Precipitation Percentile (non-exceedance) 50 42.9 57.7 55 39.3 22.5 13.2 21.8 23.5 21.1 17.4 22.4 32 36.8 37.2 52.4 76.9 88.5 96.5 99.2
Standardized Precipitation Index 0 -0.18 0.19 0.12 -0.27 -0.76 -1.12 -0.78 -0.72 -0.8 -0.94 -0.76 -0.47 -0.34 -0.33 0.06 0.74 1.2 1.81 2.39