December 2021 Summary – Tied for Tenth Warmest on Record
Blue Hill Observatory December 2021 Summary: December was very warm and much drier, less snowy and cloudier than average. The 24-hour adjusted mean temperature for the month of 36.2 deg F was 6.1 degrees warmer than the 1891-2020 130-year average for December, and it was 3.4 degrees cooler than the 1991-2020 30-year average. The month… Read More »



