Standardized Precipitation Index Table

Northern Valley Climate Division

Alabama, Climate Division 01

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.) 4.99 9.66 13.62 20.7 30.25 42.4 51.29 58.43 62.73 70.78 71.09 75.61 89.86 114.01 145.77 182.58 206.13 257.67 316.09 374.93
Accumulated Precipitation Departure from Normal (in.) 0.4 0.94 0.47 2.64 6.26 13.39 17.11 18.67 18.71 23.53 20.47 21.22 22.33 30.72 37.12 45.1 43.3 40.63 44.8 49.47
Accumulated Precipitation Percent of Average 109 111 104 115 126 146 150 147 143 150 140 139 133 137 134 133 127 119 117 115
Accumulated Precipitation Percentile (non-exceedance) 63.9 67.4 58.9 74.7 88.2 97.4 98.8 98.5 98.1 99.3 98.5 98.5 98.2 99.3 99.4 99.7 99.3 98 97.9 98
Standardized Precipitation Index 0.35 0.45 0.22 0.67 1.18 1.95 2.24 2.17 2.07 2.47 2.16 2.18 2.1 2.45 2.5 2.78 2.45 2.06 2.04 2.06