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 Jul. 2020)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 0.47 3.17 5.06 5.79 6.76 7.47 9.56 11.3 11.63 12.08 13.57 13.96 18.64 24.4 29.26 35.75 41.3 58.29 72.31 86.95
Accumulated Precipitation Departure from Normal (in.) 0.03 1.55 1.84 1.23 0.84 0.28 0.84 1.1 0.06 -0.47 0.37 0.36 1.83 3.61 2.07 1.4 0.54 3.93 4.38 5.44
Accumulated Precipitation Percent of Average 107 196 157 127 114 104 110 111 101 96 103 103 111 117 108 104 101 107 106 107
Accumulated Precipitation Percentile (non-exceedance) 63.9 92.2 88.7 77.7 70.1 59.2 67.3 69.2 54 45.8 58.1 57.9 74.2 86.9 71.4 63.9 55.8 75.2 75.1 77.8
Standardized Precipitation Index 0.35 1.42 1.21 0.76 0.53 0.23 0.45 0.5 0.1 -0.11 0.21 0.2 0.65 1.12 0.57 0.36 0.15 0.68 0.68 0.77