Standardized Precipitation Index Table

Southwest Highlands (R) Climate Division

Idaho, Climate Division 06

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.) 1.67 3.39 5.81 7.32 8.26 9.44 10.68 11.73 11.8 13.27 15.1 16.29 20.24 24.39 29.82 37.16 40.63 51.86 66.69 79.41
Accumulated Precipitation Departure from Normal (in.) 0.31 0.77 1.66 1.7 1.28 1.47 2.06 2.71 2.34 2.64 2.87 2.73 2.54 2.86 2.71 2.11 -0.01 -2.35 -1.1 -1.98
Accumulated Precipitation Percent of Average 123 129 140 130 118 118 124 130 125 125 123 120 114 113 110 106 100 96 98 98
Accumulated Precipitation Percentile (non-exceedance) 71.7 79.3 88.8 86 76.8 79.2 85.8 91.6 88.4 89.2 88.2 85.7 81.7 80.9 76.6 69.1 51.5 35.7 44.6 40.3
Standardized Precipitation Index 0.57 0.82 1.22 1.08 0.73 0.81 1.07 1.38 1.2 1.24 1.18 1.07 0.9 0.87 0.73 0.5 0.04 -0.37 -0.13 -0.24