2021 Summary – Tied for Fifth Warmest Year on Record

The year 2021 was exceptionally warm and ended in a tie as the fifth warmest on record. The 24-hour adjusted mean temperature of 50.9F was 3.1F warmer than the 130-year (1891-2020) long-term mean and 1.4F above the 30-year (1991-2020) normal. Every month was warmer than the long-term mean except for July. The annual average maximum… Read More »

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 »

November 2021 Summary – Sunniest on Record

Blue Hill Observatory November 2021 Summary:  November was near average for temperature and much drier than average. The 24-hour adjusted mean temperature for the month of 41.6 deg F was 0.9 degrees warmer than the 1891-2020 130-year average for November, and it was 0.5 degrees cooler than the 1991-2020 30-year average. The average maximum temperature… Read More »

October 2021 Summary – Sixth Warmest on Record

Blue Hill Observatory October 2021 Summary: October was very warm and much wetter than average. The 24-hour adjusted mean temperature for the month of 56.3 deg F was 5.0 degrees warmer than the 1891-2020 130-year average for October, and it was 4.1 degrees warmer than the 1991-2020 30-year average. The month was the sixth warmest… Read More »

Observatory Receives a “Save America’s Treasures” Grant to Conserve our Historic Climate Books – Your Help is Needed to Raise Matching Funds

The non-profit Blue Hill Observatory and Science Center,a National Historic Landmark located atop Great Blue Hill, was recently awarded a “Save America’s Treasures” (SAT) grant by the National Park Service to preserve many of our historic climate resources. In support of this project, the Observatory is seeking $65,000 to fulfill the obligation to raise matching… Read More »

September 2021 Summary – Warmer and Wetter Than Average

Blue Hill Observatory September 2021 Summary: September was very warm and wetter than average. The 24-hour adjusted mean temperature for the month of 64.8 deg F was 3.3 degrees warmer than the 1891-2020 130-year average for September, and it was 1.7 degrees warmer than the 1991-2020 30-year average. The month tied with 2018 as the… Read More »

August 2021 Summary – Third Warmest on Record

Blue Hill Observatory August 2021 Summary: August was very warm and wetter than average. The 24-hour adjusted mean temperature for the month of 72.6 deg F was 4.3 degrees warmer than the 1891-2020 130-year average for August, and it was 2.3 degrees warmer than the 1991-2020 30-year average. The month tied with 2012 as the… Read More »