Tuesday was yet another very warm September day with highs in the 80s and even a few isolated 90 degree readings. The featured chart attempts to put into context the warm weather this September by totaling up the number of hours for Des Moines with an air temperature of at least 70°F. The top panel shows the number of hours each year and the bottom panel compares the hour of day totals for this year and a long term simple average. So while the 2024 total is above a long term average, there have been a number of years over the past decade with a higher number of hours than this year. Climatology rapidly decreases in temperature during September, so warm weather should certainly be enjoyed!

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