Back to top

May Weather Summary

Weather as Recorded at the UMass Cranberry Station:

East Wareham

Prepared by Peter Jeranyama

May weather was slightly dry, above average in temperature and with slightly less sunshine than normal.  Rainfall was below the 30-year average. The temperatures for May averaged 59.1 degrees, 3.27 degrees above the 30-year average.  The maximum temperature was 83 degrees on the 2nd and a minimum temperature of 39 degrees was recorded on the 1st.  Daytime high temperatures averaged 67.7 degrees, 3.1 degrees above the norm.  Evening temperatures averaged 50.5 degrees, 3.4 degrees above the norm.

Based on data from the Blue Hills Observatory, sunshine averaged 51% of the possible sunshine hours, 1 percentage point below the norm.  There were only 2 days with 90% or better sunshine but 5 days with no sunshine at all.  There were 20 days that were cloudy and overcast in East Wareham. 

Precipitation totaled 2.14 inch, 1.57 inches below the average rainfall for May in East Wareham.  There were 13 days with measurable precipitation, 9 with more than 0.1 inch. The largest 24-hour rainfall events was 0.6 inches on the 20th.  Our total year-to-date rainfall is 30.74 inches, 9.35 inches above the average in East Wareham. 

Official Spring Season

The official spring (March-May) had normal average temperatures of 46.7 degrees, just slightly above the long-term average.  Snowfall for the period totaled 7 inches (none in May), 0.8 inches above average.  Precipitation was 4 inches above normal at 17.7 inches and this is 1 inch more rainfall than the same period last year (2017).  Sunshine for the spring was 549 hours, 9.3% less than the normal average number of sunshine hours for the three-month period.  Sunshine hours were below average for all spring months.