September weather forecast
Bridgeport, CT

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Weather in September

September is known as a transitional period when summer gets replaced by autumn. As temperatures begin to decrease from September onwards, the intensity of the sunlight also diminishes. Autumn hues start to spread through the Connecticut landscapes, while the first leaves begin to fall. Still, it remains an excellent time for outdoor activities.

Temperature

With the onset of September, the average high-temperature subtly recedes from August's warm 80.1°F (26.7°C) to an agreeable 73°F (22.8°C). During the month of September, Bridgeport anticipates a mean low-temperature of 61.7°F (16.5°C).

Humidity

In September, the average relative humidity is 75%.

Rainfall

In Bridgeport, in September, it is raining for 13.5 days, with typically 2.56" (65mm) of accumulated precipitation. Throughout the year, there are 170.1 rainfall days, and 37.76" (959mm) of precipitation is accumulated.

Snowfall

May through October are months without snowfall.

Ocean temperature

In Bridgeport, the average seawater temperature in September is 68.7°F (20.4°C).
Note: In 68.7°F (20.4°C), swimming is not an enjoyable activity for most. The challenge of managing one's breathing increases as the temperature goes under 69.8°F (21°C).

Daylight

In September, the average length of the day is 12h and 28min.
On the first day of September in Bridgeport, Connecticut, 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 6:35 pm EDT.

Sunshine

In September, the average sunshine is 9h.

UV index

In September, the average daily maximum UV index in Bridgeport is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the average person.
Note: In September, a daily UV index of 4 turns into the following recommendations:
Preventative actions are necessary - Recommendations to ward off sunburn are given. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
Updated: Feb 10, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the temperature in September in Bridgeport?

The high-temperature, in September, in Bridgeport, is 73°F (22.8°C), while the low-temperature averages to 61.7°F (16.5°C). The average heat index (a.k.a. 'feels like', 'apparent temperature'), which combines relative humidity and air temperature, in July is appraised at 86°F (30°C).

What is the average humidity in September in Bridgeport?

In Bridgeport, the average relative humidity in September is 75%.

How many days does it rain in September in Bridgeport?

In September, the rain falls for 13.5 days. Throughout September, 2.56" (65mm) of precipitation is accumulated.

When it does not snow in Bridgeport?

May through October are months without snowfall.

What is the ocean temperature in September in Bridgeport?

In Bridgeport, Connecticut, in September, the average water temperature is 68.7°F (20.4°C). For swimming, a surface water temperature of 68.7°F (20.4°C) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 69.8°F (21°C).

What is the average length of the day in September in Bridgeport?

In Bridgeport, Connecticut, the average day length in September is 12h and 28min.

What time are sunrise and sunset in September in Bridgeport?

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 6:35 pm EDT.

How many hours of sunshine does Bridgeport have in September?

The average sunshine duration in September in Bridgeport is 9h.

What is the UV index reading in September in Bridgeport?

In Bridgeport, Connecticut, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium health risk from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Bridgeport, CT

Average temperature in September - Bridgeport, CT
  • Average high temperature in September: 73°F

The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (36.1°F).

  • Average low temperature in September: 61.7°F

The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (26.6°F).

Average pressure in September
Bridgeport, CT

Average pressure in September - Bridgeport, 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
Bridgeport, CT

Average wind speed in September - Bridgeport, CT
  • Average wind speed in September: 7.8mph

The windiest month (with the highest average wind speed) is January (10.5mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).

Average humidity in September
Bridgeport, CT

Average humidity in September - Bridgeport, CT
  • Average humidity in September: 75%

The months with the highest relative humidity are May and June (76%).
The months with the lowest relative humidity are April and November (72%).

Average rainfall in September
Bridgeport, CT

Average rainfall in September - Bridgeport, CT
  • Average rainfall in September: 2.56"

The wettest month (with the highest rainfall) is December (4.21").
The driest month (with the least rainfall) is January (2.48").

Average rainfall days in September
Bridgeport, CT

Average rainfall days in September - Bridgeport, CT
  • Average rainfall days in September: 13.5 days

The month with the highest number of rainy days is July (18.1 days).
The month with the least rainy days is January (9.4 days).

Average snowfall in September
Bridgeport, CT

Average snowfall in September - Bridgeport, CT
  • Average snowfall in September: 0"

The month with the highest snowfall is March (2.8").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in September
Bridgeport, CT

Average snowfall days in September - Bridgeport, CT
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (7.1 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average sea temperature in September
Bridgeport, CT

Average sea temperature in September - Bridgeport, CT
  • Average sea temperature in September: 68.7°F

The best month for swimming (with the highest average sea temperature) is August (73°F).
The coldest month (with the lowest average sea temperature) is February (39°F).

Average daylight in September /
Average sunshine in September
Bridgeport, CT

Average daylight in September / Average sunshine in September - Bridgeport, 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 month with the most sunshine is July (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
Bridgeport, CT

Average sunshine days in September - Bridgeport, 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 June (11.2 days).

Average UV index in September
Bridgeport, CT

Average UV index in September - Bridgeport, 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
Bridgeport, CT

Average cloud cover in September - Bridgeport, CT
  • Average cloud cover in September: 33

The month with the most cloud cover is December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 29).

Average visibility in September
Bridgeport, CT

Average visibility in September - Bridgeport, 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).

Bridgeport, Connecticut, USA

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