This week's features have been looking at the yearly range between the warmest high and coldest low. Yesterday's feature showed a downward trend in range, meaning the difference between the warmest high and coldest low was decreasing. Today's featured chart looks more closely at this decrease. The top panel shows the yearly max temperature, the middle panel shows the yearly min, and the bottom panel shows the yearly difference between these two. An overall average is overlain for each series and a trailing 30 year average is presented as well. The trailing 30 year average shows the warmest highs decreasing and coldest lows increasing (both on average), so that would explain the decreasing range.

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Tags:   range