Ask Ellen: How rare is this September heat wave?

Today makes day-five of this September heat wave and we’ve broken a record each day. This means out of all the September 21sts, 22nds, 23rds, 24ths, and 25ths in history we’ve never seen temperatures on these dates reach quite this high. Record highs were broken for five straight days in a row at the official climate station in Grand Rapids.   So how rare is this heat wave? I decided to crunch the numbers to see how 2017 stacks up. Below is all the information I found year by year. History shows us 90s in September…