Standardized Precipitation Index Table

Southern Mountains Climate Division

North Carolina, Climate Division 01

Precipitation Data Table

Time Scale in Months (As of the end of Jun. 2020)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 4.45 10.33 18.28 23.22 33.56 40.01 46.64 50.38 58.56 59.49 63.47 68.86 87.53 105.86 148.65 184.2 211.65 260.24 323.14 373.72
Accumulated Precipitation Departure from Normal (in.) -0.47 0.85 4.27 3.68 9.3 10.91 12.58 12.39 16.51 13.36 12.17 12.06 16.75 20.05 35.05 41.66 41.49 33.46 39.85 33.98
Accumulated Precipitation Percent of Average 90 109 130 119 138 138 137 133 139 129 124 121 124 123 131 129 124 115 114 110
Accumulated Precipitation Percentile (non-exceedance) 43.4 65.4 90.3 81.8 95.7 96.6 96.8 96.3 98.1 94.5 92.4 91.8 95.1 96.2 99.5 99.7 99.5 97.1 98.1 95.7
Standardized Precipitation Index -0.17 0.4 1.3 0.91 1.72 1.83 1.85 1.79 2.08 1.6 1.43 1.39 1.66 1.78 2.58 2.76 2.58 1.9 2.07 1.72