It seems like this has been an unusual summer — a cold May and June, followed by what seemed like a warm July and then a hot and very dry August.

Actually, the high temperature average (Tmax) for July was a little below long-term average at 80 degrees, but the overnight lows (Tmin) were were well above average at 44 degrees. June also showed a similar pattern with Tmax of 74 and Tmin of 38 — again, with the overnight low being well above average.

As I have pointed out several times in this column, this is a clear sign of global warming with carbon dioxide acting as a blanket and not letting the heat of the day escape at night. We have been seeing this frequently over the past 20-30 years.



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