September weather forecastVoluntown, CT
September
Weather in September
The first month of the autumn, September, is still a pleasant month in Voluntown, Connecticut, with an average temperature varying between 72.7°F (22.6°C) and 57.2°F (14°C).Temperature
September's arrival subtly correlates with a reduction in the average high-temperature, down from a moderately hot 79.5°F (26.4°C) in August to a pleasant 72.7°F (22.6°C). In September, Voluntown's temperature tends to fall to an average low of 57.2°F (14°C) during the night.Humidity
The average relative humidity in September is 79%.Rainfall
September is the month with the least rainfall. Rain falls for 12.5 days and accumulates 1.57" (40mm) of precipitation.Snowfall
In Voluntown, snow does not fall in June through October.Daylight
The average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 6:14 am and sunset at 7:20 pm. On the last day of the month, sunrise is at 6:43 am and sunset at 6:30 pm EDT.
Sunshine
In Voluntown, the average sunshine in September is 8.6h.UV index
In Voluntown, Connecticut, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the average person.Note: In September, the maximum UV index of 4 suggests these recommendations:
Undertake protective steps - Obligation to safeguard skin and eyes from harm is in place. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Voluntown, CT
- Average high temperature in September: 72.7°F
The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (35.1°F).
- Average low temperature in September: 57.2°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (23.7°F).
Average pressure in September
Voluntown, CT
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Voluntown, CT
- Average wind speed in September: 7.1mph
The windiest month (with the highest average wind speed) is January (9.9mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).
Average humidity in September
Voluntown, CT
- Average humidity in September: 79%
The month with the highest relative humidity is June (80%).
The month with the lowest relative humidity is April (73%).
Average rainfall in September
Voluntown, CT
- Average rainfall in September: 1.57"
The wettest month (with the highest rainfall) is December (3.7").
The driest month (with the least rainfall) is September (1.57").
Average rainfall days in September
Voluntown, CT
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is May (16.9 days).
The month with the least rainy days is January (9.1 days).
Average snowfall in September
Voluntown, CT
- Average snowfall in September: 0"
The month with the highest snowfall is March (3.54").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in September
Voluntown, CT
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (7.4 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
Voluntown, CT
- 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 months with the most sunshine are July and August (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in September
Voluntown, CT
- Average sunshine days in September: 14.7 days
The month with the most sunshine days is November (17.3 days).
The month with the least sunshine days is June (10.9 days).
Average UV index in September
Voluntown, CT
- 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
Voluntown, CT
- Average cloud cover in September: 35
The month with the most cloud cover is March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in September
Voluntown, CT
- 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).
