Standardized Precipitation Index Table

South Central Climate Division

Louisiana, Climate Division 08

Precipitation Data Table

Time Scale in Months (As of the end of May 2025)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 8.65 12.35 17.77 22.61 26.17 32.11 37.66 39.23 47.1 50.45 59.49 64.54 81.37 102.42 118.15 145.09 175.59 229.01 305.12 365.37
Accumulated Precipitation Departure from Normal (in.) 3.54 2.73 3.8 4.15 2.79 3.53 5.06 2.91 5.83 3.03 5.31 4.68 7.57 13.97 -1.57 -3.18 -4.08 -10.67 5.45 5.86
Accumulated Precipitation Percent of Average 169 128 127 122 112 112 116 108 114 106 110 108 110 116 99 98 98 96 102 102
Accumulated Precipitation Percentile (non-exceedance) 87 76.5 78.4 77.1 68.7 70.8 74.8 66.3 76.1 65.1 73 69.7 75.2 86.5 47.1 43.3 42 30.9 60.4 60.1
Standardized Precipitation Index 1.13 0.72 0.78 0.74 0.49 0.55 0.67 0.42 0.71 0.39 0.61 0.52 0.68 1.1 -0.07 -0.17 -0.2 -0.5 0.26 0.26