Standardized Precipitation Index Table

East Central Climate Division

Oklahoma, Climate Division 06

Precipitation Data Table

Time Scale in Months (As of the end of Feb. 2024)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 1.27 4.56 8.28 10.01 14.98 19.76 23.33 28.15 31.38 35.53 38.1 44.68 54.48 63.51 90.77 107.26 136.95 187.28 247.65 297.15
Accumulated Precipitation Departure from Normal (in.) -1.03 -0.04 1.04 -0.36 0.7 1.44 1.74 3.12 1.8 0.16 -1.81 1.25 3.81 1.77 3.92 1.99 6.58 13.37 30.32 36.51
Accumulated Precipitation Percent of Average 55 99 114 96 105 108 108 112 106 100 95 103 108 103 105 102 105 108 114 114
Accumulated Precipitation Percentile (non-exceedance) 28.6 56.2 68.4 50.6 60.1 63.8 64.9 71.4 63.2 53.7 43.7 58.3 67.3 58.7 63.6 57.2 66.8 75.8 90.4 92.3
Standardized Precipitation Index -0.57 0.15 0.48 0.02 0.25 0.35 0.38 0.56 0.34 0.09 -0.16 0.21 0.45 0.22 0.35 0.18 0.43 0.7 1.31 1.43