The featured chart plots a histogram of observed high and low temperatures reported on 5 September for all IEM tracked long term climate sites within Iowa. The solid blue and red lines are observed frequencies with the dashed variants representing an idealized normal distribution based on the denoted statistics. The chart nicely shows the wide range of possibilities this time of year for Iowa with high temperatures above 100°F and low temperatures approaching 32°F. There is also considerable overlap shown between the two distributions with low temps and high temps in the 60s and 70s possible. The forecast for today has the high temps within this range and lows down into the 40s.

Voting:
Good = 12
Bad = 1
Abstain = 1