Standardized Precipitation Index Table

Southern Climate Division

Delaware, Climate Division 02

Precipitation Data Table

Time Scale in Months (As of the end of Jul. 2020)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 6.88 8.79 11.37 15.33 18.99 22.48 25.57 29.55 30.93 34.85 36.32 39.68 51.58 62.32 92.27 121.25 142.53 191.19 235.24 282.04
Accumulated Precipitation Departure from Normal (in.) 2.5 0.7 -0.23 0.3 0.02 0.42 0.1 0.61 -1.09 -0.53 -2.67 -3.91 -3.62 -3.33 5.02 11.94 11.67 16.73 17.24 20.44
Accumulated Precipitation Percent of Average 157 109 98 102 100 102 100 102 97 98 93 91 93 95 106 111 109 110 108 108
Accumulated Precipitation Percentile (non-exceedance) 89 64.4 50.9 56.4 52.9 56.4 53.2 57.2 44 48.3 34.4 27.5 32.6 34.7 72 88.5 86 90.4 88.4 90
Standardized Precipitation Index 1.23 0.37 0.02 0.16 0.07 0.16 0.08 0.18 -0.15 -0.04 -0.4 -0.6 -0.45 -0.39 0.58 1.2 1.08 1.31 1.19 1.28