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
In September, the average high-temperature marginally drops from a warm 80.1°F (26.7°C) in August to a pleasant 73°F (22.8°C). An average nighttime temperature of 61.2°F (16.2°C) is noted during the month of September.Humidity
In Westport, the average relative humidity in September is 75%.Rainfall
In Westport, in September, during 13.4 rainfall days, 2.72" (69mm) of precipitation is typically accumulated. Throughout the year, there are 166.3 rainfall days, and 37.87" (962mm) of precipitation is accumulated.Snowfall
In Westport, snow does not fall in May through October.Daylight
In Westport, the average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 6:20 am and sunset at 7:25 pm. On the last day of the month, sunrise is at 6:49 am and sunset at 6:36 pm EDT.
Sunshine
In September, the average sunshine is 8.9h.UV index
In Westport, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: In September, the UV index of 4 transforms into the following advice:
Be vigilant - A duty to shield skin and eyes from injury exists. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.
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?
How much does it rain in September?
When it does not snow?
How many hours of daylight does Westport have in September?
When are sunrise and sunset in September?
How many hours of sunshine does Westport have in September?
What is the UV index intensity in September?
Average temperature in September
Westport, CT
- Average high temperature in September: 73°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (35.8°F).
- Average low temperature in September: 61.2°F
The month with the highest average low temperature is July (68.2°F).
The coldest month (with the lowest average low temperature) is January (26.4°F).
Average pressure in September
Westport, 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
Westport, CT
- Average wind speed in September: 7.6mph
The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest month (with the lowest average wind speed) is July (6.5mph).
Average humidity in September
Westport, CT
- Average humidity in September: 75%
The months with the highest relative humidity are February, May and June (76%).
The months with the lowest relative humidity are April and November (72%).
Average rainfall in September
Westport, CT
- Average rainfall in September: 2.72"
The wettest month (with the highest rainfall) is July (4.13").
The driest months (with the least rainfall) are January and February (2.36").
Average rainfall days in September
Westport, CT
- Average rainfall days in September: 13.4 days
The month with the highest number of rainy days is July (18.1 days).
The month with the least rainy days is January (8.3 days).
Average snowfall in September
Westport, CT
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.83").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Westport, CT
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (7.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Westport, 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: 8h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in September
Westport, CT
- Average sunshine days in September: 14 days
The month with the most sunshine days is January (17.8 days).
The month with the least sunshine days is June (10 days).
Average UV index in September
Westport, 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
Westport, CT
- Average cloud cover in September: 34
The months with the most cloud cover are February, March and December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in September
Westport, 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).
Westport, Connecticut, USA
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