September weather forecastBarkhamsted, CT
September
Weather in September
September, the first month of the autumn in Barkhamsted, is still a pleasant month, with temperature in the range of an average low of 53.4°F (11.9°C) and an average high of 71.8°F (22.1°C).Temperature
In September, the average high-temperature marginally decreases from a warm 79°F (26.1°C) in August to an agreeable 71.8°F (22.1°C). An average low-temperature of 53.4°F (11.9°C) marks the nights throughout September.Humidity
The average relative humidity in September is 79%.Rainfall
In Barkhamsted, during September, the rain falls for 10.3 days and regularly aggregates up to 0.94" (24mm) of precipitation. In Barkhamsted, Connecticut, during the entire year, the rain falls for 134.4 days and collects up to 15.67" (398mm) of precipitation.Snowfall
May through September are months without snowfall.Daylight
In September, the average length of the day 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, in Barkhamsted, sunrise is at 6:48 am and sunset at 6:34 pm EDT.
Sunshine
In Barkhamsted, the average sunshine in September is 8.2h.UV index
In September, the average daily maximum UV index is 3. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: An average UV index of 3 in September transforms into this advice:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. To avoid the Sun's strongest rays, limit exposure around the mid-day period. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Barkhamsted, CT
- Average high temperature in September: 71.8°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (30.6°F).
- Average low temperature in September: 53.4°F
The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (18.7°F).
Average pressure in September
Barkhamsted, 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
Barkhamsted, CT
- Average wind speed in September: 5.8mph
The windiest month (with the highest average wind speed) is January (8.7mph).
The calmest months (with the lowest average wind speed) are July and August (5.3mph).
Average humidity in September
Barkhamsted, CT
- Average humidity in September: 79%
The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is April (73%).
Average rainfall in September
Barkhamsted, CT
- Average rainfall in September: 0.94"
The wettest month (with the highest rainfall) is July (1.85").
The driest month (with the least rainfall) is January (0.75").
Average rainfall days in September
Barkhamsted, CT
- Average rainfall days in September: 10.3 days
The months with the highest number of rainy days are May and July (15.3 days).
The month with the least rainy days is February (5.9 days).
Average snowfall in September
Barkhamsted, CT
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.52").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Barkhamsted, CT
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (9.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Barkhamsted, CT
- Average daylight in September: 12h and 30min
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 12min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is February (Average sunshine: 4h and 18min).
Average sunshine days in September
Barkhamsted, CT
- Average sunshine days in September: 17.4 days
The month with the most sunshine days is January (19.4 days).
The months with the least sunshine days are April and May (13.1 days).
Average UV index in September
Barkhamsted, CT
- Average UV index in September: 3
The month with the highest UV index is June (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
Barkhamsted, CT
- Average cloud cover in September: 42
The month with the most cloud cover is February (Cloud cover 54).
The month with the least cloud cover is August (Cloud cover 38).
Average visibility in September
Barkhamsted, CT
- Average visibility in September: 5mi
The months with the highest visibility are January, April, November and December (6mi).
The months with the lowest visibility are February, March, May, June, July, August, September and October (5mi).
