September was extremely warm and dry with average sunshine. The temperature averaged 65.4 degrees, 2.4 degrees per day above normal. Maximum temperature was 91.4 degrees on the 1st; a minimum temperature of 43.7 degrees was recorded on the 16th. Daytime high temperatures averaged 73.6 degrees, which is 2.2 degrees above the norm. Evening temperatures averaged 57.1 degrees, 2.6 degrees above the norm. This was the 9th warmest Septembers in the 84 years of record keeping in East Wareham. The first week of September was very hot and humid, finishing a heat wave that began at the end of August. Hurricane Earle passed east of Cape Cod on the 4th, bringing rain and breaking the hot and humid weather pattern. The last week of September was also very humid with windy conditions. Strong winds were a big part of the weather during the last half of September.
Sunshine totaled 54% of the possible sunshine hours, 2 points above the norm. We had 13 days with 90% or better sunshine and 6 days with 20% of less sunshine. We had just 1 day with morning fog in East Wareham.
Precipitation totaled 3.26 inches, 0.80 inches below normal. We had measurable rain of 0.10 inches or greater on just 3 days, and 6 days with spotty showers and drizzle with less than 0.10 inches recorded. The largest rainfall was 2.00 inches recorded on the 4th. There were two thunderstorms this month, both occurring during the early morning hours. Year-to-date rainfall for 2010 is 38.29 inches, 2.49 inches above average for East Wareham and 8.47 inches below 2009 total rainfall at the same time last year.