A strong cold front will continue to cross the Plains and Midwest, accompanied by a few showers. Heavy snow will fall through mid-week along the eastern slopes of the northern Rockies. Later in the week, snow may also blanket portions of eastern North Dakota and northern Minnesota.
Toward week’s end, widespread freezes can be expected as far south as the central High Plains and the upper Midwest, while below normal temperatures will encompass the majority of the U.S. During the weekend, lingering warmth will be limited to the Far West and lower Southeast.
September was the first cooler and wetter than normal month in 2012, according to Illinois State Climatologist Jim Angel. The statewide average precipitation for was 4.9 inches, 1.7 inches wetter than normal.