CHICAGO (WLS) -- Chicago is under a Frost Advisory Thursday night. Temperatures will be dropping into the mid- to low-30s area-wide.
This is the first potential frost of the season for Chicago.
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We may not officially reach freezing at O'Hare or Midway, but we are closing in on the average date of our first freeze.
Above you is a map showing the average date for the first freeze.
These are the specific date of the average first freeze for different towns.
Naperville - Oct. 9
Winnetka - Oct. 11
Kankakee - Oct. 11
O'Hare - Oct. 13
Joliet - Oct. 19
Midway - Oct. 24
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Be sure to check out the full ABC7 Accuweather Forecast here