Standardized Precipitation Index Table

North Central Climate Division

Oregon, Climate Division 06

Precipitation Data Table

Time Scale in Months (As of the end of Jan. 2026)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 1 5.46 7.38 8.96 9.57 9.85 10.01 10.16 11.1 11.87 14.2 16.68 25.55 27.27 34.21 46.39 52.4 72.02 87.31 103.55
Accumulated Precipitation Departure from Normal (in.) -1.53 0.27 -0.35 -0.18 -0.36 -0.5 -0.66 -1.55 -1.96 -2.54 -1.93 -1.37 -0.25 -1.15 -1.92 -0.09 -1.8 -0.23 -3.01 -4.83
Accumulated Precipitation Percent of Average 40 105 96 98 96 95 94 87 85 82 88 92 99 96 95 100 97 100 97 96
Accumulated Precipitation Percentile (non-exceedance) 4.3 60.4 48 50.6 47.6 44.8 42 28.3 23.8 17.7 25.8 34 48.9 39.1 33.3 50.6 37.8 49.6 33.8 26.8
Standardized Precipitation Index -1.71 0.26 -0.05 0.01 -0.06 -0.13 -0.2 -0.57 -0.71 -0.93 -0.65 -0.41 -0.03 -0.28 -0.43 0.01 -0.31 -0.01 -0.42 -0.62