September weather forecastBraintree, MA
September
Weather in September
September, the first month of the autumn in Braintree, is still a pleasant month, with an average temperature fluctuating between 72.7°F (22.6°C) and 57.2°F (14°C).Temperature
As August makes way for September, Braintree's average high-temperature eases from a warm 80.2°F (26.8°C) to an agreeable 72.7°F (22.6°C). Braintree's temperature in September lowers to a consistent average of 57.2°F (14°C) during the nights.Humidity
In Braintree, the average relative humidity in September is 76%.Rainfall
The month with the least rainfall is September, when the rain falls for 6.9 days and typically collects 0.31" (8mm) of precipitation.Snowfall
In Braintree, snow does not fall in June through October.Daylight
In Braintree, the average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 6:10 am and sunset at 7:17 pm. On the last day of the month, sunrise is at 6:40 am and sunset at 6:26 pm EDT.
Sunshine
The average sunshine in September is 8.3h.UV index
The average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for average individuals.Note: A maximum high UV index of 4 in September translates into the following recommendations:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Braintree, MA
- Average high temperature in September: 72.7°F
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (34°F).
- Average low temperature in September: 57.2°F
The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (22.6°F).
Average pressure in September
Braintree, 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
Braintree, MA
- Average wind speed in September: 6.8mph
The windiest month (with the highest average wind speed) is January (9.7mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in September
Braintree, MA
- Average humidity in September: 76%
The month with the highest relative humidity is February (78%).
The month with the lowest relative humidity is April (70%).
Average rainfall in September
Braintree, MA
- Average rainfall in September: 0.31"
The wettest month (with the highest rainfall) is April (0.79").
The driest month (with the least rainfall) is September (0.31").
Average rainfall days in September
Braintree, MA
- Average rainfall days in September: 6.9 days
The month with the highest number of rainy days is July (10.3 days).
The month with the least rainy days is February (4.3 days).
Average snowfall in September
Braintree, MA
- Average snowfall in September: 0"
The month with the highest snowfall is March (0.83").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in September
Braintree, MA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (4.6 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Braintree, MA
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 8h and 18min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in September
Braintree, MA
- Average sunshine days in September: 21.2 days
The month with the most sunshine days is November (22.1 days).
The month with the least sunshine days is April (17.8 days).
Average UV index in September
Braintree, MA
- Average UV index in September: 4
The months with the highest UV index are June, 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
Braintree, MA
- Average cloud cover in September: 37
The month with the most cloud cover is March (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in September
Braintree, 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).
