Standardized Precipitation Index Table

Southeastern Shore Climate Division

Maryland, Climate Division 01

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.) 1.78 7.03 14.22 16.32 17.87 22.15 24.68 29.71 33.47 36.91 41.77 43.31 51.88 61.4 82.67 96.01 119.43 175.79 217.01 272.37
Accumulated Precipitation Departure from Normal (in.) -1.49 0.32 4.11 3.27 1.44 2.13 0 0.69 0.8 0.85 2.36 -0.07 -1.61 -2.01 -4.11 -10.88 -10.85 1.94 -0.29 11.56
Accumulated Precipitation Percent of Average 54 105 141 125 109 111 100 102 102 102 106 100 97 97 95 90 92 101 100 104
Accumulated Precipitation Percentile (non-exceedance) 14.9 60.3 93.3 84.1 67.4 70.2 52.7 57.5 57.8 57.6 66.2 51.6 42.9 42 34.4 15.3 17.6 56.6 50.3 75.1
Standardized Precipitation Index -1.04 0.26 1.5 1 0.45 0.53 0.07 0.19 0.2 0.19 0.42 0.04 -0.18 -0.2 -0.4 -1.02 -0.93 0.17 0.01 0.68