Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
With September's onset, the weather reveals a slight temperature decrease, transitioning from a warm 79.7°F (26.5°C) in August to a pleasant 72.5°F (22.5°C). East Haven, in September, witnesses an average low-temperature of 60.3°F (15.7°C).Humidity
In September, the average relative humidity is 75%.Rainfall
The months with the least rainfall in East Haven are January and September Rain falls for 9.5 days and accumulates 0.51" (13mm) of rain.Snowfall
April through November are months without snowfall.Daylight
The average length of the day in September in East Haven, Connecticut, is 12h and 28min.On the first day of the month, sunrise is at 6:18 am and sunset at 7:23 pm. On the last day of September, in East Haven, sunrise is at 6:47 am and sunset at 6:34 pm EDT.
Sunshine
The average sunshine in September is 9h.UV index
In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: In September, the average maximum UV index of 4 translates into the following recommendations:
Exercise prevention - Warding off sunburn is urged. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures?
What is the average humidity in September?
What is the driest month in East Haven?
How much does it rain in September?
When it does not snow?
What is the average length of the day in September?
When is the sunrise / sunset in September in East Haven?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
East Haven, CT
- Average high temperature in September: 72.5°F
The warmest month (with the highest average high temperature) is July (80.4°F).
The month with the lowest average high temperature is January (35.2°F).
- Average low temperature in September: 60.3°F
The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (25.3°F).
Average pressure in September
East Haven, 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
East Haven, CT
- Average wind speed in September: 7.8mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).
Average humidity in September
East Haven, CT
- Average humidity in September: 75%
The month with the highest relative humidity is June (77%).
The month with the lowest relative humidity is April (72%).
Average rainfall in September
East Haven, CT
- Average rainfall in September: 0.51"
The wettest month (with the highest rainfall) is July (1.14").
The driest months (with the least rainfall) are January and September (0.51").
Average rainfall days in September
East Haven, CT
- Average rainfall days in September: 9.5 days
The month with the highest number of rainy days is July (12.8 days).
The month with the least rainy days is January (6.2 days).
Average snowfall in September
East Haven, CT
- Average snowfall in September: 0"
The month with the highest snowfall is March (0.55").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in September
East Haven, CT
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (5.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
East Haven, CT
- Average daylight in September: 12h and 3min
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 18min).
- Average sunshine in September: 9h and 0min
The months with the most sunshine are July and August (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in September
East Haven, CT
- Average sunshine days in September: 18.7 days
The month with the most sunshine days is November (21.1 days).
The month with the least sunshine days is August (16.3 days).
Average UV index in September
East Haven, 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
East Haven, CT
- Average cloud cover in September: 32
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
East Haven, 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).
East Haven, Connecticut, USA
Weather forecast for your location
2. Allow the app to use your location