Standardized Precipitation Index Table

Southern Interior Climate Division

Maine, Climate Division 02

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.) 4.73 9.43 14.27 16.7 18.36 23.44 26.13 27.81 29.32 33.79 38.46 42.46 58.52 72.19 103.96 127.82 154.91 201.38 240.79 289.24
Accumulated Precipitation Departure from Normal (in.) 1.21 2.24 3.39 2.75 0.89 1.96 0.39 -2.04 -4.23 -3.19 -2.17 -1.92 3.29 6.31 15.15 17.58 21.82 24.08 19.3 23.56
Accumulated Precipitation Percent of Average 134 131 131 120 105 109 101 93 87 91 95 96 106 110 117 116 116 114 109 109
Accumulated Precipitation Percentile (non-exceedance) 79 83 88.5 82.3 62.4 70.3 55.7 35.7 21.2 28.8 36.5 39.1 69.9 80.3 93.6 94.4 95.6 94.7 88 90.1
Standardized Precipitation Index 0.81 0.95 1.2 0.93 0.31 0.53 0.14 -0.37 -0.8 -0.56 -0.35 -0.28 0.52 0.85 1.52 1.59 1.71 1.62 1.17 1.29