Standardized Precipitation Index Table

Southern Climate Division

New Hampshire, Climate Division 02

Precipitation Data Table

Time Scale in Months (As of the end of Jul. 2020)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 4.2 6.66 9.26 14.2 17.44 20.78 23.29 29.09 32.74 38.61 40.2 44.51 57.32 67.63 101.51 122.68 146.51 193.24 234.79 276.83
Accumulated Precipitation Departure from Normal (in.) 0.22 -1.26 -2.3 -1.08 -1.54 -1.29 -2.09 -0.12 -0.53 1.55 -0.6 -0.01 1.22 1.03 12.46 11.56 13.09 15.46 12.68 10.35
Accumulated Precipitation Percent of Average 106 84 80 93 92 94 92 100 98 104 99 100 102 102 114 110 110 109 106 104
Accumulated Precipitation Percentile (non-exceedance) 60.7 32.6 23.7 40.9 36 39.3 32.3 51 47.9 62.4 48 51.8 58.3 56.6 88.9 83.7 83.3 82.6 74.9 68.9
Standardized Precipitation Index 0.27 -0.45 -0.72 -0.23 -0.36 -0.27 -0.46 0.03 -0.05 0.32 -0.05 0.05 0.21 0.17 1.22 0.98 0.97 0.94 0.67 0.49