Unseasonable warmth flirts with a long-standing nearly seven-decade record

Monday’s warmth marked the 21st and 22nd day of 90 degrees or warmer for O’Hare and Midway.  

Monday’s warmth was accompanied by plentiful sunshine, adding to the abnormally sunny September so far. 

Only two other September 16 have produced 90-degree or warmer temperatures. 

Number of 80°+ days through Monday:

Chicago is not alone in enjoying mid-summer warmth in September

Large chunk of the Midwest was treated to high temperatures 15-degrees or more above normal

AHEAD TUESDAY AFTERNOON

Extended summer warmth and plentiful sunshine make for ideal boating conditions on Lake Michigan and at area beaches. Only a modest chop is expected… 

Warmer than normal temperature trend forecast to continue through the end of September 

Forecast temperature anomaly through Sept. 22

Forecast temperature anomaly Sept. 23-29

String of 80-degree or warmer temperatures to continue the remainder of the work-week uninterrupted officially in Chicago. 

Tuesday afternoon snapshot 

Wednesday afternoon snapshot  

Thursday afternoon snapshot 

Friday afternoon snapshot