CHICAGO (CBS) — The first measurable snowfall of the season hit Chicago on Sunday, and by the time the snowstorm was over, it had broken a record, dumping 6.4 inches of snow at O’Hare International Airport.

According to the National Weather Service, it was the heaviest December snowfall in Chicago since Dec. 8, 2005, when 6.7 inches fell at O’Hare. It also broke the previous Dec. 4 record of 4.6 inches, set in 1964.

The snow began falling early Sunday morning and continued through most of the day.

Other parts of the Chicago area saw up to 8.5 inches of snow by Sunday night, according to the National Weather Service:

• DeKalb: 8.5 inches
• Romeoville: 8.1 inches
• Plano: 7.9 inches
• Batavia: 7.2 inches
• Joliet: 7.2 inches
• Oswego: 6.8 inches
• Lisle: 6.7 inches
• Geneva: 6.5 inches
• Woodstock: 6.3 inches
• Mokena: 5.9 inches
• Palatine: 5.4 inches
• Rockford: 5.3 inches
• Hobart, Indiana: 4.8 inches
• Munster, Indiana: 4.2 inches
• Valparaiso, Indiana: 3.5 inches

City and state officials had plows out on roads and interstate highways all day on Sunday, spreading salt and clearing snow.

The Chicago Department of Streets and Sanitation brought in its plow drivers at 6 a.m. Sunday, and had 210 trucks on the streets during the storm. Crews began plowing side streets around 7 p.m., and had its trucks out overnight to make sure streets were clear for the morning rush on Monday.