Standardized Precipitation Index Table

Upper Coast Climate Division

Texas, Climate Division 08

Precipitation Data Table

Time Scale in Months (As of the end of Apr. 2026)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 3.32 5.36 6.81 9.1 10.83 12.92 14.87 17.76 21.02 24.17 31.44 36.96 44.18 54.75 86.15 111.18 128.48 170.57 225.44 270.87
Accumulated Precipitation Departure from Normal (in.) 0.02 -0.79 -2.23 -3.42 -5.56 -7.19 -9.26 -10.96 -11.63 -12.7 -9.89 -8.84 -10.68 -11.21 -5.51 -0.76 -9.12 -13.01 -4.22 -4.71
Accumulated Precipitation Percent of Average 101 87 75 73 66 64 62 62 64 66 76 81 81 83 94 99 93 93 98 98
Accumulated Precipitation Percentile (non-exceedance) 58.8 45.9 30.4 24 12.7 9.6 7 5.3 5.2 3.8 12.4 17.2 15.3 16.6 36.1 49.9 31.6 27.9 44.3 44.2
Standardized Precipitation Index 0.22 -0.1 -0.51 -0.71 -1.14 -1.31 -1.48 -1.62 -1.63 -1.77 -1.16 -0.95 -1.02 -0.97 -0.36 0 -0.48 -0.59 -0.14 -0.15