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Blue Hill Observatory Rotch Memorial Monument

March 12, 2013

Pictured here is the monument near the Observatory that was originally erected in 1912 in honor of the Observatory’s founder, Abbott Lawrence Rotch.  It was later etched with a summary of the climate means and extremes that were recorded during the Observatory’s first century (1885-1984). This page lists the climate records on the monument that have been replaced since that time. An inscription on the back of the monument reads: “In memory of Abbot Lawrence Rotch, founder and director of the Blue Hill Observatory, pioneer in the study of the upper air, a life devoted to science for the good of mankind”. monument_lrg This table lists the climate statistics on the monument that have changed since 1985 and the previous values:
1885-2021 1885-1984
Average Temperature: 47.7 degree F 47.1 degree F
Average Precipitation: 49.05 inches 47.44 inches
Precipitation, Monthly Maximum: 18.81 inches, March 2010 18.78 inches, August 1955
Precipitation, Annual Maximum: 71.00 inches, 1998 65.51 inches, 1972
Average Seasonal Snowfall: 62.0 inches 60.1 inches
Snowfall, 24-hour Maximum: 29.0 inches, Mar 31 – Apr 1, 1997 28.2 inches, February 24-25, 1969
Snowfall, Monthly Maximum: 83.6 inches, February 2015 65.4 inches, February 1969
Snowfall, Seasonal Maximum: 150.8 inches, 2014-2015 136.0 inches, 1947-1948
Greatest Snow Depth on the Ground: 46 inches, February 15, 2015 42 inches, January 25, 1948 [and 43 inches, March 4, 1969]
Lowest Atmospheric Pressure (MSL): 28.42 inches, 962.4 mb, March 4, 1971 28.43 inches, 962.8 mb, March 7, 1932
Average Wind Speed and Direction: 14.7 mph, W 15.4 mph, W
 
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