Standardized Precipitation Index Table

Lower Delta Climate Division

Mississippi, Climate Division 04

Precipitation Data Table

Time Scale in Months (As of the end of Jan. 2026)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 3.7 5.27 8.17 12.88 14.38 17.77 20.67 24.11 32.2 38.77 44.53 49.21 63.86 69.54 99.8 116.42 144.57 205.21 256.96 321.89
Accumulated Precipitation Departure from Normal (in.) -1.47 -5.44 -6.93 -5.34 -6.81 -6.71 -8 -8.36 -4.85 -3.62 -3.55 -3.81 -4.39 -8.09 -6.35 -14.46 -14.81 -7.52 -9.07 2.44
Accumulated Precipitation Percent of Average 72 49 54 71 68 73 72 74 87 91 93 93 94 90 94 89 91 96 97 101
Accumulated Precipitation Percentile (non-exceedance) 33.4 6.6 6.4 17.1 11.5 13.5 10.6 11.7 27.9 35.2 36.4 36.3 37 26.4 34.2 18.3 20.4 37 36.3 54.8
Standardized Precipitation Index -0.43 -1.5 -1.52 -0.95 -1.2 -1.1 -1.25 -1.19 -0.59 -0.38 -0.35 -0.35 -0.33 -0.63 -0.41 -0.9 -0.83 -0.33 -0.35 0.12