Standardized Precipitation Index Table

Lower Valley Climate Division

Texas, Climate Division 10

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.) 1.8 4.13 7.78 8.72 9.81 17.07 18.59 19.72 22.14 22.56 23.78 24.36 38.54 49.37 54.72 64.53 73.56 93.18 131.65 161.14
Accumulated Precipitation Departure from Normal (in.) 0.37 0.21 -0.56 -1.69 -2.36 2.28 1.27 0.9 2.3 1.58 1.58 0.87 6.7 11.11 7.73 2.85 3.03 -1.06 13.6 19.32
Accumulated Precipitation Percent of Average 126 105 93 84 81 115 107 105 112 108 107 104 121 129 116 105 104 99 112 114
Accumulated Precipitation Percentile (non-exceedance) 71.5 61.4 50.6 40.2 35.3 70.2 63 60.1 68.4 63.8 63.3 58.8 80.2 89.1 78.6 61.9 61.6 49.3 79.5 85.1
Standardized Precipitation Index 0.57 0.29 0.02 -0.25 -0.38 0.53 0.33 0.26 0.48 0.35 0.34 0.22 0.85 1.23 0.79 0.3 0.3 -0.02 0.82 1.04