Standardized Precipitation Index Table

Northern Climate Division

New Hampshire, 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.) 0.62 5.03 10.88 13.12 17.74 21.69 27.9 36.7 43.43 46.84 50 52.71 64.55 77.1 100.02 119.69 140.63 179.95 229.43 278.5
Accumulated Precipitation Departure from Normal (in.) -2.12 -0.79 1.56 0.01 0.77 0.77 2.85 7.21 9.57 9.27 9.08 8.59 11.1 12.04 11.83 10.56 8.36 3.66 9.03 14.01
Accumulated Precipitation Percent of Average 23 86 117 100 105 104 111 124 128 125 122 119 121 119 113 110 106 102 104 105
Accumulated Precipitation Percentile (non-exceedance) 0.2 32.5 78.7 52.8 61.9 60.7 77.9 95.3 97.7 96.6 95.5 94.8 96.9 95.7 92.2 86.6 78.4 61.7 72.4 78.5
Standardized Precipitation Index -2.92 -0.45 0.8 0.07 0.3 0.27 0.77 1.68 2 1.83 1.69 1.63 1.86 1.72 1.42 1.11 0.79 0.3 0.59 0.79