National Weather Service United States Department of Commerce

Mild temperatures will continue through Thursday. There is a chance for patchy fog late tonight into early Monday morning, mainly in northwest and north central Illinois. Gusty south winds Monday afternoon may reach 35 to 40 mph, bringing mild temperatures, especially for central Illinois. A weak cold front will move across the area Monday into Tuesday, bringing a low chance for overnight rain showers. Widespread rain is likely Wednesday into Thursday with some parts of northwest Illinois receiving a mixture of rain and snow early Thursday morning.
This past January finished with well above normal average monthly temperatures across the region. While little snow was seen in the first 2/3rds of the month as a result of this warmth, the latter third of the month featured enough snowfall to bring Chicago and Rockford close to their normal January snow totals. For more information, see https://www.weather.gov/lot/January2023.