Standardized Precipitation Index Table

Southeast Climate Division

Oregon, Climate Division 09

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.) 1.35 4.42 5.93 6.8 7.8 8.32 9.92 9.96 11.72 13.34 14.3 16.83 21.62 23.73 29.01 35.56 39.21 50.77 64.54 77.68
Accumulated Precipitation Departure from Normal (in.) 0.11 1.63 1.62 1.22 1.32 1.27 2.5 2.2 2.89 3.18 3.03 4.36 4.84 4.21 4.08 3.61 1.86 0.96 2.26 2.94
Accumulated Precipitation Percent of Average 109 158 138 122 120 118 134 128 133 131 127 135 129 122 116 111 105 102 104 104
Accumulated Precipitation Percentile (non-exceedance) 63.6 91.3 86.9 78.1 78.5 77.4 90.9 87.6 91.9 91.3 89.3 95 93.1 88.7 86.2 78.9 66.1 58 64.4 66.2
Standardized Precipitation Index 0.35 1.36 1.12 0.78 0.79 0.75 1.34 1.15 1.4 1.36 1.24 1.65 1.48 1.21 1.09 0.8 0.42 0.2 0.37 0.42