The featured chart presents the 2024 daily high and low temperatures for Ames along with NCEI 1991-2020 climatology and the departures between the two. Of immediate notice is the two week period in January that we experienced winter last year with the rest of the season being mostly above average. The warm high temperature departures as of late have been quite large and there's an interesting difference to be noticed between those of July and August vs September and October. For the former period, you'll notice how closely the high and low temperature departures track each other vs a larger spread during the later period. The difference is due to humidity levels. Dry air will heat more easily during the day and cool more easily at night. Increased atmospheric humidity will temper the two aforementioned processes with air mass warming being able to more easily persist overnight.

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