Standardized Precipitation Index Table

Wind River Climate Division

Wyoming, Climate Division 09

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.) 0.55 2.14 2.89 4.6 5.4 6.73 7.37 7.91 9.07 10.11 12.62 13.03 19.43 23.84 27.85 37.98 46.3 68.55 83.21 101.44
Accumulated Precipitation Departure from Normal (in.) -0.45 -0.44 -2 -2.13 -2.62 -2.14 -2.42 -2.74 -2.54 -2.72 -1.39 -1.83 -0.33 0.09 -1.87 -0.62 1.7 9.1 9 12.45
Accumulated Precipitation Percent of Average 55 83 59 68 67 76 75 74 78 79 90 88 98 100 94 98 104 115 112 114
Accumulated Precipitation Percentile (non-exceedance) 22 41.7 10.7 13.6 10 16.2 13.5 10.8 14 13.4 31.2 25.3 48 53.1 33.8 46.5 64.2 93.3 91.2 95.3
Standardized Precipitation Index -0.77 -0.21 -1.24 -1.1 -1.28 -0.99 -1.1 -1.24 -1.08 -1.11 -0.49 -0.67 -0.05 0.08 -0.42 -0.09 0.36 1.5 1.35 1.67