Standardized Precipitation Index Table

North Central Climate Division

Oklahoma, Climate Division 02

Precipitation Data Table

Time Scale in Months (As of the end of Nov. 2019)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 1.03 4.63 7.23 12.82 14.01 18.41 33.13 35.76 38.06 38.84 40.13 42.39 53.29 65.93 74.28 89.9 107.25 136.9 173.49 197.6
Accumulated Precipitation Departure from Normal (in.) -0.56 0.59 0.31 2.85 1.22 1.66 12.09 11.89 12.29 11.94 12.36 13.49 17.47 20.29 16.55 15.49 20.68 21.55 29.37 24.78
Accumulated Precipitation Percent of Average 65 115 104 129 110 110 157 150 148 144 145 147 149 144 129 121 124 119 120 114
Accumulated Precipitation Percentile (non-exceedance) 49.6 66.7 59.8 81.5 65.5 66.7 97.7 97.7 97.3 96.7 96.8 97.5 98.9 99 96.1 92.6 96.1 94.5 97 93.6
Standardized Precipitation Index -0.01 0.43 0.25 0.9 0.4 0.43 2 2 1.93 1.84 1.85 1.95 2.27 2.32 1.76 1.45 1.76 1.6 1.88 1.52