May was very wet and cold with well below average sunshine. The month of May was the 2 nd coldest and third wettest in our 79 years of records here in East Wareham. Temperatures averaged 50.9 degrees, surpassed only by 49.3 degrees in 1967. Rainfall totaled 8.41 inches of rain, surpassed in 1967 with 8.68 inches and 9.18 inches in 1948. The two months (May 1967 and May 2005) were very similar, both having continuous light rains from the 5 th through the 9 th, a dry period for about two weeks and then experiencing a very strong, cold, three day nor’easter on the 24 th-26 th, with 3 or more inches of rain accompanied by damaging winds.
The temperatures for May averaged 50.9 degrees, 5.0 degrees per day below normal and 6.0 degrees colder than last year. Maximum temperature was 73.0 degrees on the 28 th and a minimum temperature of 34.0 degrees was recorded on the 13 th. Daytime high temperatures averaged 58.1 degrees, 7.8 degrees below the norm. Evening temperatures averaged 43.7 degrees, 2.1 degrees below the norm. Also, note worthy was that the daytime high did not go above 64 degrees until after the 28 th of the month.
Sunshine totaled 34% of the possible sunshine hours, 18 points below the norm. We had 10 days with no sunshine at all and 2 days with dense fog in East Wareham. This was the 2 nd lowest sunshine recorded for Blue Hill Observatory for the month of May, surpassed only by 31% sunshine recorded in 1886.
Precipitation totaled 8.41 inches. As noted above, this was the third wettest May on record, measuring 4.96 inches above normal. We had 13 days with measurable precipitation and a trace on one other day. The largest 24-hour rainfall was 2.44 inches on the 25 th, with a total of 3.11 inches over the 3 day nor’easter. Rainfall was 6.87 inches above average for the year to date in East Wareham. Last year at this time, rainfall was 5.62 inches below average, a difference of 12.49 inches between the two years.
The official spring (March-May) was cold and wet. Temperatures averaged 2.3 degrees below normal, with 7.1 inches above average rainfall and 16.5 inches above-average snowfall (due to the six snowstorms in March and the heavy rains in the nor’easter in May). Sunshine was also much below normal, but only due to the record low sunshine set in May. March and April both had above average sunshine.