September weather forecastKillingworth, CT
September
Weather in September
September, the first month of the autumn in Killingworth, is also an agreeable month, with an average temperature fluctuating between 72.3°F (22.4°C) and 59.5°F (15.3°C).Temperature
In the transition to September, Killingworth observes a minor drop in the average high-temperature, shifting from a warm 78.6°F (25.9°C) in August to an agreeable 72.3°F (22.4°C). Killingworth sees an average low-temperature of 59.5°F (15.3°C) during September.Humidity
In September, the average relative humidity is 77%.Rainfall
September is the month with the least rainfall in Killingworth. Rain falls for 13 days and accumulates 1.93" (49mm) of precipitation.Snowfall
In Killingworth, snow does not fall in June through October.Daylight
The average length of the day in September in Killingworth is 12h and 28min.On the first day of the month, sunrise is at 6:17 am and sunset at 7:22 pm. On the last day of September, sunrise is at 6:46 am and sunset at 6:33 pm EDT.
Sunshine
In September, the average sunshine in Killingworth, Connecticut, is 8.9h.UV index
In September, the average daily maximum UV index in Killingworth is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for average individuals.Note: An average UV index of 4 in September transforms into this advice:
Stay alert. Light-skinned people could suffer burns in less than 30 minutes. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Killingworth, CT
- Average high temperature in September: 72.3°F
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (35.2°F).
- Average low temperature in September: 59.5°F
The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (25.5°F).
Average pressure in September
Killingworth, 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
Killingworth, CT
- Average wind speed in September: 8.1mph
The windiest month (with the highest average wind speed) is January (10.9mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).
Average humidity in September
Killingworth, CT
- Average humidity in September: 77%
The months with the highest relative humidity are May, June and July (78%).
The month with the lowest relative humidity is April (73%).
Average rainfall in September
Killingworth, CT
- Average rainfall in September: 1.93"
The wettest month (with the highest rainfall) is December (3.66").
The driest month (with the least rainfall) is September (1.93").
Average rainfall days in September
Killingworth, CT
- Average rainfall days in September: 13 days
The month with the highest number of rainy days is July (17 days).
The month with the least rainy days is January (9 days).
Average snowfall in September
Killingworth, CT
- Average snowfall in September: 0"
The month with the highest snowfall is March (2.76").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in September
Killingworth, CT
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Killingworth, 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 54min
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 48min).
Average sunshine days in September
Killingworth, CT
- Average sunshine days in September: 14.2 days
The month with the most sunshine days is November (17.1 days).
The month with the least sunshine days is July (11.7 days).
Average UV index in September
Killingworth, 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
Killingworth, CT
- Average cloud cover in September: 33
The months with the most cloud cover are February and December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in September
Killingworth, 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).
