Standardized Precipitation Index Table

East Highlands Climate Division

Idaho, Climate Division 10

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.) 3.26 6.59 9.3 11.24 12.64 14.76 16.92 19.42 19.86 22.03 23.87 25.61 34.22 41.28 50.08 60.89 67.61 84.41 106.82 127.58
Accumulated Precipitation Departure from Normal (in.) 1.26 2.63 2.97 2.72 2.19 2.74 3.66 5.11 4.63 5.22 4.93 4.8 7.1 8.45 8.48 7.34 5.29 1.33 2.92 2.82
Accumulated Precipitation Percent of Average 163 166 147 132 121 123 128 136 130 131 126 123 126 126 120 114 108 102 103 102
Accumulated Precipitation Percentile (non-exceedance) 90.2 95.8 93.1 87.6 80.1 84.2 89 94.7 92.7 93.8 90.5 89.2 94.6 95.2 92.1 86.4 76.5 57.3 62.4 61.1
Standardized Precipitation Index 1.3 1.73 1.48 1.16 0.84 1 1.23 1.61 1.45 1.54 1.31 1.24 1.61 1.67 1.41 1.1 0.72 0.18 0.32 0.28