May was our first warmer than normal month this year in Harpswell, but many days of cool sea breezes kept it from being the much warmer than normal month that Portland had. May was 4.6 degrees cooler in Harpswell than Portland, a much larger differential than I've seen in any month. Previously, the largest differential in a single day was 7.6 degrees; in May we doubled that record on the 26th, which was 15.2 degrees cooler in Harpswell than Portland, and had four days with a differential of more than 10 degrees.
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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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