Standardized Precipitation Index Table

East Highlands Climate Division

Idaho, Climate Division 10

Precipitation Data Table

Time Scale in Months (As of the end of Jun. 2020)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 3.29 5.13 6.79 9.12 10.7 13.63 15.43 16.33 17.43 20.46 20.97 21.63 29.06 37.28 43.59 56.16 65.22 95.05 118.81 141.97
Accumulated Precipitation Departure from Normal (in.) 1.69 1.4 1.18 1.52 1.14 1.7 1.3 0.27 -0.2 1.6 1.07 0.81 2.64 4.54 1.96 2.64 2.8 11.85 14.85 17.24
Accumulated Precipitation Percent of Average 206 138 121 120 112 114 109 102 99 108 105 104 110 114 105 105 104 114 114 114
Accumulated Precipitation Percentile (non-exceedance) 92.3 82.7 76.1 77.4 71.4 74.8 68.2 55.9 50.3 69.2 64 61.1 74.2 83.4 65.1 66.7 65.9 90.4 92.5 93.8
Standardized Precipitation Index 1.43 0.94 0.71 0.75 0.56 0.67 0.47 0.15 0.01 0.5 0.36 0.28 0.65 0.97 0.39 0.43 0.41 1.3 1.44 1.54