Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
In Marstons Mills, entering September brings a subtle temperature decrement, reducing from August's warm 73.6°F (23.1°C) to an agreeable 68.2°F (20.1°C). Maintaining close parity with daytime warmth, the average nocturnal temperature during September stays at a refreshing 62.2°F (16.8°C).Humidity
In Marstons Mills, the average relative humidity in September is 79%.Rainfall
The month with the least rainfall is September, when the rain falls for 11.6 days and typically collects 1.85" (47mm) of precipitation.Snowfall
In Marstons Mills, snow does not fall in May through October.Daylight
The average length of the day in September is 12h and 28min.On the first day of the month, sunrise is at 6:08 am and sunset at 7:14 pm. On the last day of September, sunrise is at 6:38 am and sunset at 6:24 pm EDT.
Sunshine
The average sunshine in September is 8.7h.UV index
In September, the average daily maximum UV index in Marstons Mills is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the ordinary person.Note: The maximum daily UV index of 5 in September converts into the following recommendations:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Marstons Mills in September?
What is the average humidity in September?
What is the driest month?
How many days does it rain in September?
When it does not snow?
What is the average length of the day in September?
When are sunrise and sunset in September?
How many hours of sunshine does Marstons Mills have in September?
How high is the UV index in September?
Average temperature in September
Marstons Mills, MA
- Average high temperature in September: 68.2°F
The warmest month (with the highest average high temperature) is August (73.6°F).
The month with the lowest average high temperature is January (37.9°F).
- Average low temperature in September: 62.2°F
The month with the highest average low temperature is August (68.4°F).
The coldest month (with the lowest average low temperature) is January (29.7°F).
Average pressure in September
Marstons Mills, 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
Marstons Mills, MA
- Average wind speed in September: 11.7mph
The windiest month (with the highest average wind speed) is January (15.3mph).
The calmest month (with the lowest average wind speed) is August (9.9mph).
Average humidity in September
Marstons Mills, MA
- Average humidity in September: 79%
The months with the highest relative humidity are May, June and July (82%).
The month with the lowest relative humidity is November (74%).
Average rainfall in September
Marstons Mills, MA
- Average rainfall in September: 1.85"
The wettest month (with the highest rainfall) is December (3.7").
The driest month (with the least rainfall) is September (1.85").
Average rainfall days in September
Marstons Mills, MA
- Average rainfall days in September: 11.6 days
The month with the highest number of rainy days is April (15.6 days).
The month with the least rainy days is January (9.3 days).
Average snowfall in September
Marstons Mills, MA
- Average snowfall in September: 0"
The month with the highest snowfall is March (2.36").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Marstons Mills, MA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (6.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Marstons Mills, MA
- Average daylight in September: 12h and 3min
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 4min
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
Marstons Mills, MA
- Average sunshine days in September: 16.7 days
The month with the most sunshine days is September (16.7 days).
The month with the least sunshine days is April (13 days).
Average UV index in September
Marstons Mills, 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
Marstons Mills, MA
- Average cloud cover in September: 32
The months with the most cloud cover are March and December (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in September
Marstons Mills, 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).
Marstons Mills, Massachusetts, USA
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