Standardized Precipitation Index Table

North Central Climate Division

Oklahoma, Climate Division 02

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.) 0.82 1.54 3.08 6.46 7.84 10.5 12.92 15.72 21.62 26.91 30.41 33.14 35.15 39.37 54.33 62.07 77.12 108.35 151.55 187.97
Accumulated Precipitation Departure from Normal (in.) -1.1 -1.5 -0.84 1.42 1.24 1.43 1 0.8 3.81 5.15 4.37 4.31 2.39 1.43 -3.35 -4.76 -9.49 -7.25 6.97 14.53
Accumulated Precipitation Percent of Average 43 51 79 128 119 116 108 105 121 124 117 115 107 104 94 93 89 94 105 108
Accumulated Precipitation Percentile (non-exceedance) 24.9 20.7 39.7 76 71 69.6 63.9 61 80 83.3 78.2 77.5 66.2 60.1 36.8 32.6 19.9 29.8 69 81.7
Standardized Precipitation Index -0.68 -0.82 -0.26 0.71 0.55 0.51 0.36 0.28 0.84 0.97 0.78 0.76 0.42 0.26 -0.34 -0.45 -0.85 -0.53 0.5 0.9