Standardized Precipitation Index Table

Coastal Climate Division

Maine, Climate Division 03

Precipitation Data Table

Time Scale in Months (As of the end of Mar. 2024)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 10.7 12.08 17.39 25.28 28.3 33.65 38.36 44.88 50.33 55.84 61.1 64.32 76.26 93.88 116.19 140.96 167.76 209.14 262.37 314.73
Accumulated Precipitation Departure from Normal (in.) 6.55 4.44 5.75 9.21 7.6 8.71 9.63 12.98 15.06 17 18.65 17.88 18.22 22.56 23.44 23.34 28.71 23.9 30.92 37.13
Accumulated Precipitation Percent of Average 258 158 149 157 137 135 134 141 143 144 144 139 131 132 125 120 121 113 113 113
Accumulated Precipitation Percentile (non-exceedance) 99.4 95.8 96.3 99 96.3 96.6 97 99.1 99.5 99.6 99.7 99.4 98.9 99.1 98.3 96.5 97.6 92.1 94.2 95.4
Standardized Precipitation Index 2.51 1.72 1.78 2.33 1.78 1.83 1.89 2.35 2.55 2.68 2.77 2.53 2.29 2.37 2.12 1.81 1.99 1.41 1.57 1.68