The warmest day of the year by far was yesterday with high temperatures soaring into the 90s. This was the warmest weather we have seen since last September. The featured chart displays the period for Ames between the average last date for a high temperature at or above a given threshold to the average first date of the year. The right hand side chart is simply the number of days represented by the bars. The change in slope of the plot on the right hand side is interesting and it is not clear exactly what it is illustrating, but as you get to very warm temperatures, the annual influence on the period decreases as the average period increases to a full year's period.

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Tags:   highs