Table 2: Rainfall data for 1989–2012 growing season at Dixon Springs in Southern Illinois.

Year Rainfall (cm)
AprilMayJuneJulyAugustSeptemberGrowing season

19896.14.114.312.810.04.651.9
199014.528.24.46.410.58.872.8
199112.58.91.83.74.012.443.3
19926.16.77.613.43.919.156.8
199312.313.017.813.410.919.486.8
199416.21.510.26.09.87.050.7
199517.722.015.27.38.24.875.2
199614.814.29.013.11.414.867.3
19979.514.914.55.87.54.056.2
199815.36.519.310.311.82.565.7
199910.36.816.810.02.31.547.7
20006.215.815.16.83.88.356.0
20016.08.49.315.99.89.358.7
200219.024.73.15.17.218.877.9
200312.432.211.94.013.512.686.6
20046.513.55.48.14.80.038.3
200510.04.76.510.818.26.857.0
20067.510.27.021.37.721.375.0
20078.27.37.19.94.57.444.4
200811.66.65.811.67.03.245.8
200912.920.09.934.79.413.299.9
20108.812.210.56.89.28.555.2
201135.321.420.611.17.816.6112.6
20123.31.63.09.46.713.237.1
1989–2012 average11.012.19.89.87.99.559.8
30-year average12.313.910.310.28.39.464.4