Standardized Precipitation Index Table

Western Climate Division

Utah, Climate Division 01

Precipitation Data Table

Time Scale in Months (As of the end of Nov. 2019)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 1.33 1.45 2.46 2.73 3.25 3.79 6.49 8.44 10.42 11.73 12.6 13.2 15.94 16.98 22.14 25.5 33.35 42.81 53.94 64.29
Accumulated Precipitation Departure from Normal (in.) 0.61 -0.16 0.15 -0.38 -0.55 -0.63 0.96 1.9 2.93 3.43 3.5 3.36 3.79 2.71 2.49 1.41 3.88 3.54 4.85 5.38
Accumulated Precipitation Percent of Average 184 90 106 88 86 86 117 129 139 141 138 134 131 119 113 106 113 109 110 109
Accumulated Precipitation Percentile (non-exceedance) 90 48 61.3 40.8 36.2 34.8 75.3 86.7 93.2 95 94.7 93.6 93.1 85.1 79.4 66.7 83 77.1 81.1 81
Standardized Precipitation Index 1.28 -0.05 0.29 -0.23 -0.35 -0.39 0.68 1.11 1.49 1.65 1.62 1.52 1.48 1.04 0.82 0.43 0.95 0.74 0.88 0.88