Standardized Precipitation Index Table

Southwest Climate Division

Oklahoma, Climate Division 07

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.) 1.23 3.17 6.08 6.54 10.55 12.16 13.28 17.77 22.2 26.34 27.6 28.7 32.39 39.17 53.94 59.34 80.33 109.61 141.95 173.78
Accumulated Precipitation Departure from Normal (in.) 0.08 1.04 2.7 1.65 2.91 1.62 0.32 2.47 3.33 2.95 1.53 0.84 1.14 0.74 -1.81 -7.06 -3.41 -2.14 2.2 6.05
Accumulated Precipitation Percent of Average 107 149 180 134 138 115 102 116 118 113 106 103 104 102 97 89 96 98 102 104
Accumulated Precipitation Percentile (non-exceedance) 64.5 80.4 91.5 78.1 81.7 70 57.2 73.4 75.7 72.4 62.9 58.3 59.4 56.5 43.9 23.8 39.2 44.7 57.4 66.1
Standardized Precipitation Index 0.37 0.85 1.38 0.78 0.9 0.52 0.18 0.62 0.7 0.59 0.33 0.21 0.24 0.16 -0.15 -0.71 -0.27 -0.13 0.19 0.41