Standardized Precipitation Index Table

West Ozarks Climate Division

Missouri, Climate Division 04

Precipitation Data Table

Time Scale in Months (As of the end of Jan. 2026)
1 2 3 4 5 6 7 8 9 10 11 12 15 18 24 30 36 48 60 72
Accumulated Precipitation (in.) 0.92 1.05 3.34 6.63 10.26 11.76 14.4 21.31 28.25 38.01 39.97 41.14 52.37 58.32 84.72 103.16 125.8 172.18 218.58 269.76
Accumulated Precipitation Departure from Normal (in.) -1.31 -3.76 -4.69 -4.95 -5.4 -7.6 -8.69 -6.55 -4.9 0.48 -1.18 -2.22 0.97 -4.43 -1.99 -2.92 -4.23 -1.2 1.96 9.9
Accumulated Precipitation Percent of Average 41 22 42 57 66 61 62 76 85 101 97 95 102 93 98 97 97 99 101 104
Accumulated Precipitation Percentile (non-exceedance) 19.1 0.4 3.6 7.6 10.2 4.2 3.4 12.4 22.6 55.2 45.7 40.3 56.8 32.9 44.2 42 38.8 48.2 55.4 69.9
Standardized Precipitation Index -0.88 -2.65 -1.8 -1.43 -1.27 -1.73 -1.83 -1.15 -0.75 0.13 -0.11 -0.25 0.17 -0.44 -0.14 -0.2 -0.28 -0.05 0.14 0.52