Standardized Precipitation Index Table

Northwest Climate Division

North Dakota, Climate Division 01

Precipitation Data Table

Time Scale in Months (As of the end of Jun. 2021)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 2.34 4.23 4.84 4.94 5.29 5.49 5.69 5.85 6.31 6.56 7.52 10.02 14.37 15.22 30.14 36.37 43.07 57.14 72.99 89.7
Accumulated Precipitation Departure from Normal (in.) -0.99 -1.26 -1.81 -2.34 -2.44 -2.71 -3 -3.4 -3.88 -5.15 -6.02 -5.83 -8.15 -8.86 -1.57 -3.58 -4.47 -6.28 -6.33 -5.57
Accumulated Precipitation Percent of Average 70 77 73 68 68 67 65 63 62 56 56 63 64 63 95 91 91 90 92 94
Accumulated Precipitation Percentile (non-exceedance) 26.8 30 21.8 14.3 12.8 10.2 7.4 5 3.4 1.3 0.8 2.1 1.5 0.9 38.1 25.3 21.8 17.5 20.2 25.5
Standardized Precipitation Index -0.62 -0.53 -0.78 -1.07 -1.13 -1.27 -1.44 -1.65 -1.83 -2.24 -2.4 -2.04 -2.17 -2.38 -0.3 -0.67 -0.78 -0.93 -0.83 -0.66