Standardized Precipitation Index Table

High Plateau (R) Climate Division

Oregon, Climate Division 05

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.) 3.86 7.19 12.58 16.04 18.01 19.12 20.13 20.94 21.07 22.45 24.32 26.37 35.45 44.87 53.7 67.07 70.74 88.68 111.42 135.19
Accumulated Precipitation Departure from Normal (in.) 1.12 1.46 3.03 2.46 0.94 0.23 0.34 0.66 0.3 0.47 0.64 0.86 0.41 0.47 2.69 -2.76 -5.68 -13.25 -16.09 -17.93
Accumulated Precipitation Percent of Average 141 125 132 118 105 101 102 103 101 102 103 103 101 101 105 96 93 87 87 88
Accumulated Precipitation Percentile (non-exceedance) 80 75.4 83.3 74.5 61 55.4 56.1 58.3 55.6 56.7 57.6 58.9 55 54.7 65 40.7 29.9 13.3 11.7 11.5
Standardized Precipitation Index 0.84 0.69 0.96 0.66 0.28 0.14 0.15 0.21 0.14 0.17 0.19 0.23 0.13 0.12 0.38 -0.24 -0.53 -1.11 -1.19 -1.2