September weather forecast and climate
Branford, CT

Snow on the rocks and a pier on the water of the famed Stony Creek in Brandford City, Connecticut
Snow on the rocks and a pier on the water of the famed Stony Creek in Brandford City, Connecticut

Weather in September

The first month of the autumn, September, is still a pleasant month in Branford, Connecticut, with average temperature varying between 59.9°F (15.5°C) and 73°F (22.8°C).

Temperature

In September, the average high-temperature slightly decreases, from a warm 79.7°F (26.5°C) in August, to a pleasant 73°F (22.8°C). In September, in Branford, the average low-temperature is 59.9°F (15.5°C).

Humidity

In Branford, the average relative humidity is 76%.

Rainfall

September is the month with the least rainfall. Rain falls for 12.9 days and accumulates 2.09" (53mm) of precipitation.

Snowfall

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

Daylight

In September, the average length of the day in Branford, Connecticut, is 12.5h.

Sunshine

In Branford, the average sunshine is 9h.

UV index

In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from the exposure to the Sun's UV radiation for ordinary individuals.
Note: The daily maximum UV index of 4 interpret into the following advice:
Take precautions - Protection against the skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the average humidity in September in Branford?

In Branford, Connecticut, the average relative humidity in September is 76%.

What is the driest month in Branford?

The month with the least rainfall is September when the rain falls for 12.9 days and typically collects 2.09" (53mm) of precipitation.

How many days does it rain in September in Branford?

In September, in Branford, Connecticut, the rain falls for 12.9 days. Throughout September, 2.09" (53mm) of precipitation is accumulated.

When it does not snow in Branford?

In Branford snow does not fall in June through October.

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

The average length of the day in September in Branford is 12.5h.

How many hours of sunshine does Branford have in September?

In Branford, the average sunshine in September is 9h.

What is the UV index intensity in September in Branford?

In Branford, Connecticut, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate health threat from the exposure to the Sun's UV rays.

Average temperature in September
Branford, CT

Average temperature in September - Branford, CT
  • Average high temperature in September: 73°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: 59.9°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 (25.5°F).

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Average pressure in September
Branford, CT

Average pressure in September - Branford, CT
  • Average pressure in September: 30.05"

The month with the highest atmospheric pressure is November (30.09").
The month with the lowest atmospheric pressure is June (29.93").

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Average wind speed in September
Branford, CT

Average wind speed in September - Branford, CT
  • Average wind speed in September: 7.6mph

The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (6.7mph).

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Average humidity in September
Branford, CT

Average humidity in September - Branford, CT
  • Average humidity in September: 76%

The month with the highest relative humidity is June (77%).
The month with the lowest relative humidity is April (72%).

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Average rainfall in September
Branford, CT

Average rainfall in September - Branford, CT
  • Average rainfall in September: 2.09"

The wettest month (with the highest rainfall) is December (3.94").
The driest month (with the least rainfall) is September (2.09").

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Average rainfall days in September
Branford, CT

Average rainfall days in September - Branford, CT
  • Average rainfall days in September: 12.9 days

The month with the highest number of rainy days is July (17.6 days).
The month with the least rainy days is January (9.6 days).

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Average snowfall in September
Branford, CT

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

The month with the highest snowfall is March (3.11").
Months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in September
Branford, CT

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

The month with the highest number of snowfall days is February (7.7 days).
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
Branford, CT

Average daylight in September / Average sunshine in September - Branford, CT
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.3h).

  • Average sunshine in September: 9h

Months with the most sunshine are July and August (Average sunshine: 10.6h).
The month with the least sunshine is February (Average sunshine: 4.8h).

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Average sunshine days in September
Branford, CT

Average sunshine days in September - Branford, CT
  • Average sunshine days in September: 14.1 days

The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is June (11.3 days).

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Average UV index in September
Branford, CT

Average UV index in September - Branford, CT
  • Average UV index in September: 4

Months with the highest UV index are June, July and August (UV index 6).
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
Branford, CT

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

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).

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Average visibility in September
Branford, CT

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

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

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