It was quite warm for September this past weekend with highs into the 90s for much of the state both days. For Waterloo, a high temperature of 95°F on Saturday was followed by a high of 93°F on Sunday. As measured by average high temperature over a two day period, this was the warmest such period so far this year. The featured chart presents the warmest two days each year for Waterloo. The bottom left panel shows the day of year frequency with participating within such a period. The 13-14 September period this year comes in at the end of the observed range for such an event to occur. While not quite as hot as this past weekend, the warm temperatures will continue throughout much of this week.

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