Meteorology (Weather)/night weather temperatures Chicago
I live in Chicago, and often during the summer (even July-August) it'll be 80+ and humid during the day, but drop down to the low 60s and even high 50s at night. Why is this? I seem to remember as a kid (the mid 1980s and early 1990s) that it was hot and humid all day and night in Chicago, but in recent years it gets downright chilly past 11:00 pm. Can you shed any light on this?
Chicago is greatly influenced by the temperature of Lake Michigan. Some summers are affected by the winter's impact on lake temperatures. Strong polar high pressures can bring abnormal temperatures to the Chicago area's water and thus influencing spring and summer's air temperatures.