Standardized Precipitation Index Table

CO Drainage Basin (S) Climate Division

Colorado, Climate Division 02

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.) 2.81 5.07 6.92 8.32 9.39 10.95 11.88 13.62 14.2 15.36 16.41 17.85 26.54 33.21 42.58 52.93 61.18 74.69 93.22 113.45
Accumulated Precipitation Departure from Normal (in.) 0.74 1.19 1.19 0.78 0.27 0.03 -0.72 -0.76 -1.8 -1.63 -2.22 -2.74 0.23 1.71 1.38 0.86 -0.58 -7.66 -9.78 -10.26
Accumulated Precipitation Percent of Average 136 131 121 110 103 100 94 95 89 90 88 87 101 105 103 102 99 91 91 92
Accumulated Precipitation Percentile (non-exceedance) 80.5 84.4 77.9 68.6 58 53.4 41 40.5 26.5 29.8 23.9 20 54.4 67.4 63.1 57.9 47.3 13 9.9 10.5
Standardized Precipitation Index 0.86 1.01 0.77 0.48 0.2 0.08 -0.23 -0.24 -0.63 -0.53 -0.71 -0.84 0.11 0.45 0.33 0.2 -0.07 -1.13 -1.29 -1.25