March weather forecast and climate
Illinois, USA

Flag of Illinois, USA
Flag of Illinois, USA

Weather in March

March is the beginning of the spring season in Illinois, which starts with cold and icy conditions. The average low temperatures are in the cold 26°F (-3.3°C) to 36°F (2.2°C), while the average high temperatures are in the mild 44°F (6.7°C) to 59°F (15°C) zone. The southernmost region of Illinois registers the warmest temperatures, with the rapid advance of spring. Cairo in the south is one of the mildest places, with temperatures in the 37°F (2.8°C) to 59°F (15°C) range.
The rainfall sees an uptick to register in the 2" (51mm) to 4" (102mm) range, while the Chicago Area and the northern regions receive up to 6" (152mm) of snow. Snowstorms occur occasionally, and cold waves are common during the early days of spring.
The weather demands warm clothing in the form of coats and jackets to counter the icy precipitation and snow. The moderate sunlight lasts for 6 hours a day, but the nights are cold, windy, and soggy in many regions in March in Illinois.
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