Hot and Humid Weather Continues Today

The first extended heat wave of the summer will continue through this evening. A lake breeze is not expected today, so no relief is anticipated for the city of Chicago.  Slightly cooler and less humid weather will then move in for the weekend. 

 Heat Advisory

Forecast Maximum and Minimum Heat Index Values




Today & Tonight

forecast maximum heat index map for thursday

forecast minimum heat index map for thursday night


NWS Chicago Heat Advisory and Warning Criteria

Heat Definitions

In addition, for areas besides Cook County if there is a 4th consecutive day of a max heat index of 100°F+ then an advisory will be issued, and if a 4th consecutive day with a max heat index of 105°F+ then a warning will be issued.

 Detailed Definition of Warnings, Watches, and Advisories


Additional Information

Heat Safety

 Further Heat Safety Information

 National Heat Index Extended Forecast

 Beach Forecast

 Heat Briefing Page

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