Standardized Precipitation Index Table

South Coast Drainage Climate Division

California, Climate Division 06

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.) 3.67 13.92 16.6 19.51 20.29 20.35 20.51 21.09 21.1 21.24 21.97 22.05 45.23 51.34 52.39 63.54 64.07 75.62 91.79 113.83
Accumulated Precipitation Departure from Normal (in.) 0.59 7.2 6.19 6.4 5.7 5.08 5.03 5.49 5.43 5.51 5.82 4.65 17.47 18.67 17.59 13.62 12.01 6.17 4.85 9.32
Accumulated Precipitation Percent of Average 119 207 159 149 139 133 132 135 135 135 136 127 163 157 151 127 123 109 106 109
Accumulated Precipitation Percentile (non-exceedance) 69.5 91.7 84.5 84.6 82.3 79.9 79.7 81.3 81 81.3 82.3 78.2 95.3 95.8 95.1 86.6 83.8 68.8 64.1 71.7
Standardized Precipitation Index 0.51 1.39 1.01 1.02 0.93 0.84 0.83 0.89 0.88 0.89 0.92 0.78 1.67 1.73 1.65 1.11 0.99 0.49 0.36 0.57