Standardized Precipitation Index Table

Northern Piedmont Climate Division

North Carolina, Climate Division 03

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.) 5.09 7.19 13.94 20.34 22.15 23.57 27.63 31.62 35.8 39.98 43.26 49.7 59.67 71.56 94.95 112.27 134.57 199.45 247.4 314.97
Accumulated Precipitation Departure from Normal (in.) 1.09 -0.19 3.04 6.04 4.93 3.22 3.47 2.96 2.36 2.44 1.83 4.74 3.83 6.26 5.05 2.07 -0.24 19.61 22.76 45.56
Accumulated Precipitation Percent of Average 127 97 128 142 129 116 114 110 107 107 104 111 107 110 106 102 100 111 110 117
Accumulated Precipitation Percentile (non-exceedance) 77.9 51 85.4 95 88.8 78.4 77.1 73 69.1 68.7 64 78.6 72.2 80.5 73 59.6 50.1 94.3 94.9 99.8
Standardized Precipitation Index 0.77 0.02 1.06 1.64 1.22 0.79 0.74 0.61 0.5 0.49 0.36 0.79 0.59 0.86 0.61 0.24 0 1.58 1.63 2.94