Standardized Precipitation Index Table

Panhandle Climate Division

Oklahoma, Climate Division 01

Precipitation Data Table

Time Scale in Months (As of the end of Feb. 2026)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 0.09 0.54 0.63 1.43 2.77 5.21 10.07 12.68 16.46 19.92 21.46 21.85 22.34 29.09 42.4 50.82 70.67 83.73 99.91 115.52
Accumulated Precipitation Departure from Normal (in.) -0.56 -0.58 -1.13 -1.17 -1.33 -0.74 1.62 1.51 2.43 3.01 2.89 2.15 0.85 3.42 3 5.42 11.54 4.95 1.42 -2.7
Accumulated Precipitation Percent of Average 14 48 36 55 68 88 119 114 117 118 116 111 104 113 108 112 120 106 101 98
Accumulated Precipitation Percentile (non-exceedance) 11.4 24.7 11.3 21.4 27.7 41.3 75.6 70.8 76.1 78.9 77.8 71.8 60.3 76.6 70 79.1 91.8 70.8 56.6 42.2
Standardized Precipitation Index -1.2 -0.68 -1.21 -0.79 -0.59 -0.22 0.69 0.55 0.71 0.8 0.76 0.58 0.26 0.73 0.52 0.81 1.39 0.55 0.17 -0.2