September weather forecastBethlehem, CT
September
Weather in September
The first month of the autumn, September, is also an agreeable month in Bethlehem, Connecticut, with an average temperature ranging between max 72.3°F (22.4°C) and min 54.1°F (12.3°C).Temperature
Bethlehem's September weather shows a modest shift in high-temperatures, falling from August's moderately hot 79.7°F (26.5°C) to an agreeable 72.3°F (22.4°C). During September, Bethlehem experiences an average low-temperature of 54.1°F (12.3°C) at night.Humidity
The average relative humidity in September in Bethlehem is 79%.Rainfall
September is the month with the least rainfall in Bethlehem. Rain falls for 13.5 days and accumulates 2.24" (57mm) of precipitation.Snowfall
In Bethlehem, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 28min.On the first day of September in Bethlehem, Connecticut, sunrise is at 6:19 am and sunset at 7:25 pm. On the last day of the month, sunrise is at 6:49 am and sunset at 6:35 pm EDT.
Sunshine
In Bethlehem, the average sunshine in September is 8.5h.UV index
In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: The maximum daily UV index of 4 in September converts into the following recommendations:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Bethlehem, CT
- Average high temperature in September: 72.3°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 (31.5°F).
- Average low temperature in September: 54.1°F
The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure in September
Bethlehem, CT
- Average pressure in September: 30.06"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
Bethlehem, CT
- Average wind speed in September: 5.6mph
The windiest months (with the highest average wind speed) are January and March (8.1mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in September
Bethlehem, CT
- Average humidity in September: 79%
The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is April (73%).
Average rainfall in September
Bethlehem, CT
- Average rainfall in September: 2.24"
The wettest month (with the highest rainfall) is December (3.62").
The driest month (with the least rainfall) is September (2.24").
Average rainfall days in September
Bethlehem, CT
- Average rainfall days in September: 13.5 days
The month with the highest number of rainy days is June (17.7 days).
The months with the least rainy days are January and February (8.1 days).
Average snowfall in September
Bethlehem, CT
- Average snowfall in September: 0"
The month with the highest snowfall is February (6.1").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Bethlehem, CT
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Bethlehem, 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 30min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 24min).
Average sunshine days in September
Bethlehem, CT
- Average sunshine days in September: 14.2 days
The month with the most sunshine days is November (16.6 days).
The month with the least sunshine days is June (10.5 days).
Average UV index in September
Bethlehem, CT
- Average UV index in September: 4
The months with the highest UV index are June and July (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
Bethlehem, CT
- Average cloud cover in September: 39
The months with the most cloud cover are February and March (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 36).
Average visibility in September
Bethlehem, CT
- Average visibility in September: 5mi
The months with the highest visibility are April and November (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October and December (5mi).
