Standardized Precipitation Index Table

Northern Coastal Plain Climate Division

North Carolina, Climate Division 08

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.) 6.69 8.37 11.69 17.84 20.58 21.96 27.75 32.56 37.3 40.49 43.44 48.17 57.42 67.24 90.97 107.89 136.4 202.21 252.72 312.65
Accumulated Precipitation Departure from Normal (in.) 2.77 0.84 0.47 3.16 2.9 1.05 2.39 1.78 0.67 -0.68 -1.63 -0.35 -2.32 -2.19 -6.08 -10.08 -9.22 7.91 9.97 21.46
Accumulated Precipitation Percent of Average 171 111 104 122 116 105 109 106 102 98 96 99 96 97 94 91 94 104 104 107
Accumulated Precipitation Percentile (non-exceedance) 96.2 67.8 59.9 84 79.1 62.6 70.8 65.9 57.1 46.6 40 49.2 37.3 39.3 23 13.5 16.4 76.8 79.2 94.6
Standardized Precipitation Index 1.77 0.46 0.25 0.99 0.81 0.32 0.55 0.41 0.18 -0.09 -0.25 -0.02 -0.32 -0.27 -0.74 -1.1 -0.98 0.73 0.81 1.61