Standardized Precipitation Index Table

Panhandle Climate Division

Idaho, Climate Division 01

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.) 1.17 3.53 8.19 9.51 11.36 13.19 21.12 25.85 27.25 29.72 32 32.98 37.22 45.6 60.46 75.21 96.63 141.98 177.99 209.81
Accumulated Precipitation Departure from Normal (in.) 0.07 0.11 2.21 1.23 -0.16 -1.68 1.7 1.83 -1.51 -1.87 -1.33 -1.52 -3.24 -3.78 -8.58 -8.74 -6.93 4 5.65 3.18
Accumulated Precipitation Percent of Average 106 103 137 115 99 89 109 108 95 94 96 96 92 92 88 90 93 103 103 102
Accumulated Precipitation Percentile (non-exceedance) 63.6 58.9 86 71.7 51 32.9 69 68.1 40.7 39.4 43.7 42.4 33.2 31.4 16.7 19.3 27.9 62.9 65.4 58.5
Standardized Precipitation Index 0.35 0.22 1.08 0.57 0.03 -0.44 0.5 0.47 -0.23 -0.27 -0.16 -0.19 -0.44 -0.48 -0.97 -0.87 -0.59 0.33 0.4 0.21