Just when summer started to slip away, on August 15th (the first time the normal daily temperature dropped since January 3rd), we started an extended period of warmer than normal temperatures. On the 28th, temps were ever so slightly below normal, but other than that the warmer than normal period continued until September 3rd, which would have been 20 consecutive days above normal, tied for the longest streak I have seen on my weather station (since January 2011). August average temperatures were warmer then July, which only happens about one year in three. That they were warmer by 1.9 degrees is very unusual; August has only been that much warmer than July 8 times in the last 74 years in Portland. But it wasn't enough to keep this summer from being the 3rd consecutive season colder than normal (see fourth graph), based on meteorological seasons (summer = June, July and August), the first time that has happened at my station.
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SOURCEWeather statistics are based on 5-minute readings at an Ambient Weather station near Mill Cove off of upper Harpswell Sound. Archives
December 2015
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