Standardized Precipitation Index Table

Green and Bear Drainage Climate Division

Wyoming, Climate Division 03

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.) 1.55 3.13 4.22 4.94 5.72 6.75 8.02 9.8 10.58 13.02 14.14 15.47 19.85 23.54 30.66 36.89 42.92 52.55 66.54 79.26
Accumulated Precipitation Departure from Normal (in.) 0.38 0.9 0.88 0.56 0.32 0.19 0.35 1.15 1.03 2.37 1.92 1.91 2.96 3.4 3.53 3.21 2.25 -1.69 -1.29 -2.16
Accumulated Precipitation Percent of Average 132 140 126 113 106 103 105 113 111 122 116 114 117 117 113 110 106 97 98 97
Accumulated Precipitation Percentile (non-exceedance) 80.8 88.8 81.7 71.4 62.8 58.2 61.3 76.4 73.2 88.7 81.5 79.9 87.7 88 85 80 70.1 38.5 42.5 37.6
Standardized Precipitation Index 0.87 1.22 0.9 0.57 0.33 0.21 0.29 0.72 0.62 1.21 0.9 0.84 1.16 1.17 1.04 0.84 0.53 -0.29 -0.19 -0.31