Mean annual temperature ranges from about 45 to 53 degrees F, and mean annual precipitation ranges from about 25 to 35 inches. These are the Del Rey , Jericho , Martinton , Montgomery , Mundelein , Pella , Wauconda , and Zurich soils. Del Rey, Martinton, Mundelein, and Wauconda soils are on lower positions on the landscape and have some grayer colors and are somewhat poorly drained. In addition, Martinton and Mundelein soils have mollic epipedons and Wauconda soils have darker colored surface horizons. Zurich soils are on similar landscapes.
Jericho soils have darker colored surface horizons.
Montgomery and Pella soils are in depressional areas, are poorly drained, and have mollic epipedons. The potential for surface runoff is, typically medium or high, but ranges from low to very high. Permeability is moderately slow. Most areas are in cropland. Principal crops are corn, oats, and forages.