Standardized Precipitation Index Table

Piedmont Plateau Climate Division

Alabama, Climate Division 05

Precipitation Data Table

Time Scale in Months (As of the end of Feb. 2024)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 5.65 14.48 16.94 19.67 22.08 23.98 28.87 33.7 39.69 43.83 49.23 56.64 72.51 83.52 115.72 142.83 179.09 239.14 300.32 366.26
Accumulated Precipitation Departure from Normal (in.) 0.36 4.09 1.43 0.47 0.04 -1.51 -0.82 -1.24 0.49 0.7 1.28 2.51 2.85 3.86 7.45 8.96 16.64 22.47 29.5 41.28
Accumulated Precipitation Percent of Average 107 139 109 102 100 94 97 96 101 102 103 105 104 105 107 107 110 110 111 113
Accumulated Precipitation Percentile (non-exceedance) 61.7 89.8 66.5 57.1 53.4 41.6 46.8 43.7 55.2 56.2 58.8 64.2 63.5 66.2 74.8 76.1 88.5 92 95.1 98.4
Standardized Precipitation Index 0.3 1.27 0.43 0.18 0.08 -0.21 -0.08 -0.16 0.13 0.16 0.22 0.36 0.34 0.42 0.67 0.71 1.2 1.41 1.66 2.14