Standardized Precipitation Index Table

Upper Plains Climate Division

Alabama, Climate Division 03

Precipitation Data Table

Time Scale in Months (As of the end of Jul. 2020)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 5.04 9.67 12.74 22.24 30.29 43.68 51.88 59.24 62.67 71.91 72.09 77.97 90.44 110.49 144.53 180.14 200.45 252.48 309.74 364.16
Accumulated Precipitation Departure from Normal (in.) -0.04 0.43 -0.83 3.58 5.58 13.65 16.47 18.43 17.79 24 20.76 22.62 21.51 25.22 33.94 39.65 34.62 31.28 33.14 32.23
Accumulated Precipitation Percent of Average 99 105 94 119 123 145 147 145 140 150 140 141 131 130 131 128 121 114 112 110
Accumulated Precipitation Percentile (non-exceedance) 54.3 59.9 43.9 79.7 85.4 97.6 98.7 98.7 98.1 99.6 98.8 99.2 98.3 98.5 99.4 99.6 98.7 97 96.5 95.3
Standardized Precipitation Index 0.11 0.25 -0.15 0.83 1.06 1.98 2.21 2.24 2.07 2.63 2.26 2.4 2.11 2.17 2.49 2.67 2.23 1.88 1.81 1.67