The coldest high and low temperature this month for Des Moines happened on the 11th for high and 12-13th for low. The featured chart presents the frequency of a given day in September being the coldest for that month during one year. Intuitively, the highest frequencies occur toward the end of the month as our average temperatures slide into fall. The forecast has warm temperatures up until next Wednesday, so there is a chance that these early September lows will be the coldest this year.

Voting:
Good = 10
Bad = 13
Abstain = 4

Tags:   sep