Standardized Precipitation Index Table

Upper Plains Climate Division

Alabama, Climate Division 03

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.) 7.11 12.38 20.57 24.08 26.48 27.33 28.56 32.33 38.96 42.75 45.74 51.57 70.77 83.32 109.46 140.52 179.81 240.47 316.43 385.64
Accumulated Precipitation Departure from Normal (in.) 1.01 0.94 3.74 1.9 0.27 -1.92 -4.1 -4.38 -2.86 -3.27 -4.61 -3.87 -1.48 -1.46 -1.53 0.15 13.23 18.26 38.62 52.32
Accumulated Precipitation Percent of Average 117 108 122 109 101 93 87 88 93 93 91 93 98 98 99 100 108 108 114 116
Accumulated Precipitation Percentile (non-exceedance) 69.2 64 81.5 67.1 54.7 39.3 26.5 26 35.6 33.8 28.2 33.5 45.8 46.3 46.7 51.8 80.9 85.3 97.3 99.3
Standardized Precipitation Index 0.5 0.36 0.9 0.44 0.12 -0.27 -0.63 -0.64 -0.37 -0.42 -0.58 -0.42 -0.11 -0.09 -0.08 0.04 0.87 1.05 1.93 2.46