Standardized Precipitation Index Table

Southern Climate Division

New Hampshire, Climate Division 02

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.) 8.29 8.92 14.9 21.61 23.95 27.29 32.05 37.65 46.64 52.83 57.03 60.95 72.21 85.72 108.33 130.04 160.53 200.3 249.12 302.34
Accumulated Precipitation Departure from Normal (in.) 4.57 2.14 4.78 7.61 5.92 5.45 6.45 8.32 13.23 15.49 16.05 16.25 17.42 19.26 19.09 19.03 26.74 22.07 26.46 35.27
Accumulated Precipitation Percent of Average 223 131 147 154 133 125 125 128 140 141 139 136 132 129 121 117 120 112 112 113
Accumulated Precipitation Percentile (non-exceedance) 98.1 84.7 96.1 99.2 95.4 91.1 92.9 95.7 99.2 99.5 99.4 99.2 99.3 98.6 96.5 94 97 90.6 91 94
Standardized Precipitation Index 2.08 1.02 1.76 2.39 1.68 1.35 1.47 1.72 2.4 2.61 2.54 2.42 2.44 2.19 1.81 1.55 1.89 1.31 1.34 1.56