WindyCity Weather and News on X: #Chicagoweather #ChiWx #ILWx Factoid At - 40 you can interchangeably use either Celsius or Fahrenheit. -40C=-40F And you thought that only happens in science labs. Below -40

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US National Weather Service Chicago Illinois - [4:00 PM CST

US National Weather Service Chicago Illinois - A powerful cold

Chicago First Alert Weather: Temperatures warming up by the

Windy and warm Chicago Sunday with temperatures 30 degrees above

Wind chills as low as -40° expected tonight, Wind Chill Warnings

Chicago First Alert Weather: Highs in the upper 70s, gusty wind

US National Weather Service Chicago Illinois - Gusty winds are

5:40 AM - US National Weather Service Chicago Illinois

Solved Figure 4 is a surface weather map for OOZ 1 November

Chicago gets warm, windy weekend weather - CBS Chicago

Chicago First Alert Weather: Highs in the upper 70s, gusty wind

Chicago First Alert Weather: Mostly cloudy with near-normal temps