Standardized Precipitation Index Table

Southwestern Valleys Climate Division

Oregon, Climate Division 03

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.) 6.99 12.61 24.47 31.82 36.83 39.55 41.95 42.23 42.24 42.98 44.43 48.94 65.23 81.63 97.2 122.86 128.65 167.91 208.49 249.88
Accumulated Precipitation Departure from Normal (in.) 1.69 1.51 5.98 5.34 3.36 2.53 3.51 3.29 2.9 2.14 1.02 2.12 -0.04 -2.2 3.57 -7.71 -11.68 -19.32 -25.74 -31.4
Accumulated Precipitation Percent of Average 132 114 132 120 110 107 109 108 107 105 102 105 100 97 104 94 92 90 89 89
Accumulated Precipitation Percentile (non-exceedance) 77.3 67.8 85.4 78.7 67.7 63.7 67.3 66.6 65.1 62 57.1 61.3 52.1 45.3 62.2 33.2 25.1 16.3 11.7 9
Standardized Precipitation Index 0.75 0.46 1.05 0.8 0.46 0.35 0.45 0.43 0.39 0.3 0.18 0.29 0.05 -0.12 0.31 -0.43 -0.67 -0.98 -1.19 -1.34