Hot and humid conditions in the Midwest will be exacerbated this week by what experts describe as a “corn sweat.” ...

The peak average highs for many in the United States are hit in July or early August, but in some locations it's as early as June or as late as early fall.

The National Weather Service has warned of "searing heat and oppressive humidity that occurs during the 'dog days of summer'." ...

View the latest weather forecasts, maps, news and alerts on Yahoo Weather. Find local weather forecasts for Chicago, United States throughout the world ...

A heat dome​ is trapping over 90 million Americans in extreme temperatures this week with the National Weather Service​ ...

Warmer weather will return to western Washington on Tuesday and Wednesday as a brief ridge of high pressure moves over the ...