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
The onset of September brings a small shift in high-temperatures, falling from a moderately hot 78.6°F (25.9°C) in August to an agreeable 72.1°F (22.3°C). An average temperature of 58.8°F (14.9°C) is recorded during the nights in September.Humidity
The average relative humidity in September is 78%.Rainfall
The month with the least rainfall in Somerset is September, when the rain falls for 11.2 days and typically collects 1.06" (27mm) of precipitation.Snowfall
June through October are months without snowfall in Somerset, Massachusetts.Daylight
The average length of the day in September is 12h and 28min.On the first day of the month, sunrise is at 6:11 am and sunset at 7:17 pm. On the last day of September, sunrise is at 6:41 am and sunset at 6:27 pm EDT.
Sunshine
In September, the average sunshine is 8.8h.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 the average person.Note: The UV index of 4 during September leads to these advisories:
Put precautions into practice - Guidance to elude sunburn is provided. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Frequently asked questions
What are September temperatures in Somerset?
What is the average humidity in September in Somerset?
What is the driest month in Somerset?
How many days does it rain in September in Somerset?
When it does not snow in Somerset?
What is the average length of the day in September in Somerset?
When is the sunrise / sunset in September in Somerset?
How long on average sun shines in September in Somerset?
How high is the UV index in September in Somerset?
Average temperature in September
Somerset, MA
- Average high temperature in September: 72.1°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (36°F).
- Average low temperature in September: 58.8°F
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (25.2°F).
Average pressure in September
Somerset, MA
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Somerset, MA
- Average wind speed in September: 8.2mph
The windiest months (with the highest average wind speed) are January, February and March (10.9mph).
The calmest month (with the lowest average wind speed) is August (7.3mph).
Average humidity in September
Somerset, MA
- Average humidity in September: 78%
The month with the highest relative humidity is June (80%).
The month with the lowest relative humidity is April (73%).
Average rainfall in September
Somerset, MA
- Average rainfall in September: 1.06"
The wettest month (with the highest rainfall) is October (1.97").
The driest month (with the least rainfall) is September (1.06").
Average rainfall days in September
Somerset, MA
- Average rainfall days in September: 11.2 days
The month with the highest number of rainy days is July (15 days).
The month with the least rainy days is February (6.9 days).
Average snowfall in September
Somerset, MA
- Average snowfall in September: 0"
The month with the highest snowfall is March (2.13").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in September
Somerset, MA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (5.9 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
Somerset, 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 5min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The months with the least sunshine are February and December (Average sunshine: 4h and 54min).
Average sunshine days in September
Somerset, MA
- Average sunshine days in September: 15.9 days
The month with the most sunshine days is November (19.2 days).
The month with the least sunshine days is April (13.6 days).
Average UV index in September
Somerset, 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 and December (UV index 2).
Average cloud cover in September
Somerset, MA
- Average cloud cover in September: 32
The month with the most cloud cover is March (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in September
Somerset, 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).
Somerset, Massachusetts, USA
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