Dear Tom,
I know we are still having warm weather, but what has been the date of the city’s earliest snowfall in the fall?

Thanks,
Jessica Sonale

Dear Jessica,

Chicago’s snow season historically begins around Halloween, the average date of the season’s first snowflakes. Since 1884 when the city’s snow climatology was launched, the start of the city’s snow season has varied tremendously, starting as early as Sept. 25 with traces of snow in 1928 and 1942 and as late as December 5 in 1999 the city finally logged the 1999-2000 season’s first snowfall (0.1”). The city’s earliest official occurrence of measurable snow was on Oct. 12, 2006, when both Midway and O’Hare recorded 0.3 inches. Though the snow fell with great intensity that day, it quickly melted in the city, but it was a different story in the suburbs, where up to 2 inches accumulated, creating a wintry landscape against a background of bright fall foliage.