September weather forecast
Bethany, CT

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Weather in September

The first month of the autumn, September, is also an agreeable month in Bethany, Connecticut, with an average temperature ranging between max 73.2°F (22.9°C) and min 58.1°F (14.5°C).

Temperature

The transition into September is accompanied by a slight temperature decrease, with the average high-temperature shifting from a moderately hot 80.1°F (26.7°C) in August to a pleasant 73.2°F (22.9°C). Nighttime temperature experiences an average drop to a refreshing 58.1°F (14.5°C) in September.

Humidity

In Bethany, the average relative humidity in September is 77%.

Rainfall

In Bethany, Connecticut, during September, the rain falls for 10.8 days and regularly aggregates up to 1.02" (26mm) of precipitation. Throughout the year, in Bethany, there are 134.2 rainfall days, and 15.12" (384mm) of precipitation is accumulated.

Snowfall

In Bethany, snow does not fall in June through October.

Daylight

The average length of the day in September in Bethany 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, sunrise is at 6:48 am and sunset at 6:35 pm EDT.

Sunshine

In September, the average sunshine in Bethany is 8.8h.

UV index

The average daily maximum UV index in September in Bethany is 4. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The daily high UV index of 4 during September translates into the following recommendations:
Undertake protective steps - Preventing sun damage is advised. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. To cut down UV radiation exposure by about half, sport a wide-brim hat.
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Frequently asked questions

What are September temperatures in Bethany?

The average high-temperature and low-temperature during September are 73.2°F (22.9°C) and 58.1°F (14.5°C) respectively. In July, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which factors the actual air temperature with the relative humidity, is computed to be 87.8°F (31°C).

What is the average humidity in September in Bethany?

The average relative humidity in September in Bethany is 77%.

How many days does it rain in September in Bethany?

In Bethany, Connecticut, in September, during 10.8 rainfall days, 1.02" (26mm) of precipitation is typically accumulated.

When it does not snow in Bethany?

June through October are months without snowfall in Bethany, Connecticut.

How many hours of daylight does Bethany have in September?

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

What time are sunrise and sunset in September in Bethany?

In September, on the first day of the month, sunrise is at 6:18 am and sunset at 7:24 pm. On the last day of the month, sunrise is at 6:48 am and sunset at 6:35 pm EDT.

How long on average sun shines in September in Bethany?

In September, the average sunshine duration in Bethany is 8.8h.

What is the UV index reading in September in Bethany?

The average daily maximum UV index in September in Bethany, Connecticut, is 4. A UV Index estimate of 3 to 5 represents a moderate health threat 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
Bethany, CT

Average temperature in September - Bethany, CT
  • Average high temperature in September: 73.2°F

The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (34.5°F).

  • Average low temperature in September: 58.1°F

The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).

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Average pressure in September
Bethany, CT

Average pressure in September - Bethany, 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).

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Average wind speed in September
Bethany, CT

Average wind speed in September - Bethany, CT
  • Average wind speed in September: 6.7mph

The windiest month (with the highest average wind speed) is January (9.2mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).

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Average humidity in September
Bethany, CT

Average humidity in September - Bethany, CT
  • Average humidity in September: 77%

The month with the highest relative humidity is February (78%).
The month with the lowest relative humidity is April (72%).

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Average rainfall in September
Bethany, CT

Average rainfall in September - Bethany, CT
  • Average rainfall in September: 1.02"

The wettest month (with the highest rainfall) is July (1.69").
The driest month (with the least rainfall) is February (0.79").

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Average rainfall days in September
Bethany, CT

Average rainfall days in September - Bethany, CT
  • Average rainfall days in September: 10.8 days

The month with the highest number of rainy days is July (15.3 days).
The month with the least rainy days is January (7.2 days).

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Average snowfall in September
Bethany, CT

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

The month with the highest snowfall is February (1.14").
The months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in September
Bethany, CT

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

The month with the highest number of snowfall days is February (6.7 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

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

Average daylight in September / Average sunshine in September - Bethany, 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 12min).

  • Average sunshine in September: 8h and 5min

The months with the most sunshine are July and August (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).

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Average sunshine days in September
Bethany, CT

Average sunshine days in September - Bethany, CT
  • Average sunshine days in September: 17.3 days

The month with the most sunshine days is January (20.8 days).
The month with the least sunshine days is June (13.2 days).

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Average UV index in September
Bethany, CT

Average UV index in September - Bethany, 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).

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Average cloud cover in September
Bethany, CT

Average cloud cover in September - Bethany, CT
  • Average cloud cover in September: 35

The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 31).

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Average visibility in September
Bethany, CT

Average visibility in September - Bethany, CT
  • Average visibility in September: 6mi

The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).

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Bethany, Connecticut, USA

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