Chicago weather: May's warm streak continues

There are two days left in May which is currently running about 1 degree per day warmer than normal.  

Today and tomorrow will add to the surplus with highs in the upper 80s with a few spots tagging 90. 

Skies will be mostly to partly sunny today through Thursday with a small chance of afternoon "pop-up" showers. Friday through the weekend look continued quite warm with mid to upper 80s tapering to lower 80s by Sunday.  There are some reliable signs that a more-pronounced cool down will take place next week.  

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Sunlight interacting with gunk in our stagnant lower atmosphere will create higher levels of Ozone today warranting an air pollution action day from the EPA. This is a caution to people with respiratory difficulties to limit prolonged or strenuous outdoor activity.