September weather forecastBethany, CT
September
Weather in September
The first month of the autumn, September, is also an agreeable month in Bethany, Connecticut, with an average temperature ranging between max 73.2°F (22.9°C) and min 58.1°F (14.5°C).Temperature
The transition into September is accompanied by a slight temperature decrease, with the average high-temperature shifting from a moderately hot 80.1°F (26.7°C) in August to a pleasant 73.2°F (22.9°C). Nighttime temperature experiences an average drop to a refreshing 58.1°F (14.5°C) in September.Humidity
In Bethany, the average relative humidity in September is 77%.Rainfall
In Bethany, Connecticut, during September, the rain falls for 10.8 days and regularly aggregates up to 1.02" (26mm) of precipitation. Throughout the year, in Bethany, there are 134.2 rainfall days, and 15.12" (384mm) of precipitation is accumulated.Snowfall
In Bethany, snow does not fall in June through October.Daylight
The average length of the day in September in Bethany is 12h and 28min.On the first day of the month, sunrise is at 6:18 am and sunset at 7:24 pm. On the last day of September, sunrise is at 6:48 am and sunset at 6:35 pm EDT.
Sunshine
In September, the average sunshine in Bethany is 8.8h.UV index
The average daily maximum UV index in September in Bethany is 4. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: The daily high UV index of 4 during September translates into the following recommendations:
Undertake protective steps - Preventing sun damage is advised. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Bethany, CT
- Average high temperature in September: 73.2°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (34.5°F).
- Average low temperature in September: 58.1°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 (23.4°F).
Average pressure in September
Bethany, CT
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Bethany, CT
- Average wind speed in September: 6.7mph
The windiest month (with the highest average wind speed) is January (9.2mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).
Average humidity in September
Bethany, CT
- Average humidity in September: 77%
The month with the highest relative humidity is February (78%).
The month with the lowest relative humidity is April (72%).
Average rainfall in September
Bethany, CT
- Average rainfall in September: 1.02"
The wettest month (with the highest rainfall) is July (1.69").
The driest month (with the least rainfall) is February (0.79").
Average rainfall days in September
Bethany, CT
- Average rainfall days in September: 10.8 days
The month with the highest number of rainy days is July (15.3 days).
The month with the least rainy days is January (7.2 days).
Average snowfall in September
Bethany, CT
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.14").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in September
Bethany, CT
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (6.7 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
Bethany, 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 48min
The months with the most sunshine are July and August (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in September
Bethany, CT
- Average sunshine days in September: 17.3 days
The month with the most sunshine days is January (20.8 days).
The month with the least sunshine days is June (13.2 days).
Average UV index in September
Bethany, 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
Bethany, CT
- Average cloud cover in September: 35
The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in September
Bethany, CT
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
