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December 2017

Weather as Recorded at the UMass Cranberry Station:

East Wareham

Prepared by Peter Jeranyama


Unlike last year, December 2017 was colder than average in temperature and dry.  The temperature averaged 30.5 degrees, 3.9 degrees per day below the 30-year average (compared to almost 14 degrees above average in 2015).  Maximum temperature was 57.0 degrees on the 6th; a minimum temperature of 4.0 degrees was recorded on the 29th and 31st.  Daytime high temperatures averaged 38.3 degrees, 4.4 degrees below the norm.  Evening temperatures averaged 22.7 degrees, 3.5 degrees below the norm.


Precipitation totaled 2.78 inches, 1.75 inches below normal.  We recorded 6 days with more than 0.1 inches of rain. The largest rainfall was 0.72 inches on the 6th.  Total rainfall for 2017 was 55.72 inches, 5.68 inches above the average for East Wareham and 14.48 inches more than the total rainfall for 2016. Therefore, 2017 was a wet year.  There were 3 days with measurable snow this month – a cumulative total of 5.6 inches fell on the 15th, 16th and the 31st. The total snowfall was 1.38 inches below the average for the month of December in East Wareham of 6.98 inches.


Sunshine for the month (recorded at the Blue Hills Observatory) was below average, totaling 43% of possible, 5 points below the norm.  There were six days with 90% or greater sunshine hours and 5 days with no sunshine at all.