Standardized Precipitation Index Table

Central Piedmont Climate Division

North Carolina, Climate Division 04

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.) 4.95 6.62 13.03 20.23 22.13 23.3 25.82 30.9 34.85 39.57 42.36 48.7 58.95 70.18 93.23 110.82 131.96 196.28 246.19 311.96
Accumulated Precipitation Departure from Normal (in.) 0.8 -1.13 1.62 5.23 4.16 2.16 0.82 1.22 0.18 0.73 -0.38 2.44 1.28 2.77 0.69 -2.85 -6.85 11.07 14.8 34.39
Accumulated Precipitation Percent of Average 119 85 114 135 123 110 103 104 101 102 99 105 102 104 101 97 95 106 106 112
Accumulated Precipitation Percentile (non-exceedance) 72.3 34.8 72.7 91.8 84.6 70.5 59.1 61.2 53.4 57.1 49.3 66.7 58.9 65.8 54.4 39.5 25.9 82.7 87.4 99.3
Standardized Precipitation Index 0.59 -0.39 0.6 1.39 1.02 0.54 0.23 0.28 0.08 0.18 -0.02 0.43 0.23 0.41 0.11 -0.27 -0.65 0.94 1.15 2.46