Standardized Precipitation Index Table

Northeastern Shore Climate Division

Maryland, 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.) 1.67 7.36 15.26 18.05 19.12 22.67 25.47 31.66 34.87 36.03 40.03 41.51 50.07 59.63 84.7 103.14 125.86 177.39 213.93 271.48
Accumulated Precipitation Departure from Normal (in.) -1.26 1.12 5.53 5.28 3.16 2.99 1.28 3.15 2.57 0.07 0.6 -1.67 -2.81 -3.22 -1.68 -2.97 -3.77 4.52 -2.11 12.21
Accumulated Precipitation Percent of Average 57 118 157 141 120 115 105 111 108 100 102 96 95 95 98 97 97 103 99 105
Accumulated Precipitation Percentile (non-exceedance) 16.7 75.1 97.5 92.9 80.8 77.1 63 74.4 69.5 52.7 55.9 41.5 35.9 35.6 44.2 39.6 37.6 64.9 44.8 79.3
Standardized Precipitation Index -0.96 0.68 1.95 1.47 0.87 0.74 0.33 0.66 0.51 0.07 0.15 -0.21 -0.36 -0.37 -0.15 -0.26 -0.32 0.38 -0.13 0.82