September weather forecastOak Bluffs, MA
September
Weather in September
The first month of the autumn, September, is still a pleasant month in Oak Bluffs, Massachusetts, with an average temperature fluctuating between 63.5°F (17.5°C) and 68.2°F (20.1°C).Temperature
With the beginning of September, the average high-temperature shows a small decrease, transitioning from a warm 73.8°F (23.2°C) in August to an agreeable 68.2°F (20.1°C). Recording a slight drop from the daily maximum, Oak Bluffs notes an average low temperature of 63.5°F (17.5°C) in the month of September.Humidity
In September, the average relative humidity in Oak Bluffs is 78%.Rainfall
In September, the rain falls for 5.9 days. Throughout September, 0.47" (12mm) of precipitation is accumulated. In Oak Bluffs, during the entire year, the rain falls for 89.3 days and collects up to 6.14" (156mm) of precipitation.Snowfall
April through November are months without snowfall.Ocean temperature
In Oak Bluffs, in September, the average water temperature is 66.4°F (19.1°C).Note: For most individuals, swimming in 66.4°F (19.1°C) is not enjoyable. As the water temperature decreases from 69.8°F (21°C) to 59°F (15°C), breathing control becomes increasingly difficult.
Daylight
The average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 6:09 am and sunset at 7:14 pm. On the last day of the month, sunrise is at 6:38 am and sunset at 6:25 pm EDT.
Sunshine
In Oak Bluffs, the average sunshine in September is 8.6h.UV index
In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for average individuals.Note: The UV index of 5 in September translates into these instructions:
Act with care - The need to guard against sun damage is communicated. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Oak Bluffs, MA
- Average high temperature in September: 68.2°F
The warmest month (with the highest average high temperature) is August (73.8°F).
The month with the lowest average high temperature is January (38.7°F).
- Average low temperature in September: 63.5°F
The month with the highest average low temperature is August (68.9°F).
The coldest month (with the lowest average low temperature) is January (30.2°F).
Average pressure in September
Oak Bluffs, MA
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Oak Bluffs, MA
- Average wind speed in September: 12.4mph
The windiest month (with the highest average wind speed) is January (16mph).
The calmest month (with the lowest average wind speed) is July (10.7mph).
Average humidity in September
Oak Bluffs, MA
- Average humidity in September: 78%
The months with the highest relative humidity are May, June and July (83%).
The month with the lowest relative humidity is November (74%).
Average rainfall in September
Oak Bluffs, MA
- Average rainfall in September: 0.47"
The wettest month (with the highest rainfall) is October (0.83").
The driest month (with the least rainfall) is July (0.35").
Average rainfall days in September
Oak Bluffs, MA
- Average rainfall days in September: 5.9 days
The month with the highest number of rainy days is July (9.1 days).
The months with the least rainy days are September and November (5.9 days).
Average snowfall in September
Oak Bluffs, MA
- Average snowfall in September: 0"
The months with the highest snowfall are January and February (0.24").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Oak Bluffs, MA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (5.6 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in September
Oak Bluffs, MA
- Average sea temperature in September: 66.4°F
The best month for swimming (with the highest average sea temperature) is August (68.5°F).
The coldest month (with the lowest average sea temperature) is February (37.9°F).
Average daylight in September /
Average sunshine in September
Oak Bluffs, MA
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 8h and 36min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in September
Oak Bluffs, MA
- Average sunshine days in September: 21.4 days
The month with the most sunshine days is September (21.4 days).
The month with the least sunshine days is February (18.5 days).
Average UV index in September
Oak Bluffs, MA
- Average UV index in September: 5
The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in September
Oak Bluffs, MA
- Average cloud cover in September: 32
The month with the most cloud cover is December (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in September
Oak Bluffs, MA
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
