September weather forecast
New Bedford, MA

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Amazing stonework looking over at the white Breakwater Entrance Lighthouse in the New Bedford Harbor, Massachusetts
Amazing stonework looking over at the white Breakwater Entrance Lighthouse in the New Bedford Harbor, Massachusetts

Weather in September

September marks the subtle arrival of fall in New Bedford. Temperatures begin to drop, with average highs lowering to a more moderate 71.2°F (21.8°C). The decreasing temperatures signal the transition from summer to fall, bringing an assortment of beautiful leaf colors across the city. The daylight hours and sunshine duration gradually lessen, giving way to slightly longer evenings. Despite the climate change, the relative humidity maintains a similar level, leading to cooler yet somewhat moist conditions.

Temperature

September's arrival in New Bedford subtly correlates with a reduction in the average high-temperature, down from a moderately hot 78.3°F (25.7°C) in August to a pleasant 71.2°F (21.8°C). New Bedford experiences an average nighttime temperature of 59.7°F (15.4°C) in the month of September.

Humidity

In September, the average relative humidity in New Bedford is 78%.

Rainfall

September is the month with the least rainfall in New Bedford. Rain falls for 10.5 days and accumulates 1.06" (27mm) of precipitation.

Snowfall

In New Bedford, snow does not fall in May through October.

Ocean temperature

In New Bedford, the average seawater temperature in September is 65.8°F (18.8°C).
Note: Swimming in 65.8°F (18.8°C) is not pleasurable for most people. Breathing control grows increasingly challenging as the water temperature falls under 69.8°F (21°C).

Daylight

In September, the average length of the day in New Bedford is 12h and 28min.
On the first day of the month, sunrise is at 6:10 am and sunset at 7:16 pm. On the last day of September, in New Bedford, sunrise is at 6:40 am and sunset at 6:26 pm EDT.

Sunshine

In New Bedford, Massachusetts, the average sunshine in September is 8.7h.

UV index

The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for average individuals.
Note: A maximum UV index of 4 in September translates into the following recommendations:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
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Frequently asked questions

What is the temperature in September in New Bedford?

During September, New Bedford experiences an average high-temperature of 71.2°F (21.8°C) and a low-temperature of 59.7°F (15.4°C).

What is the average humidity in September in New Bedford?

In September, the average relative humidity in New Bedford is 78%.

What is the driest month in New Bedford?

The month with the least rainfall is September, when the rain falls for 10.5 days and typically collects 1.06" (27mm) of precipitation.

How many days does it rain in September in New Bedford?

In New Bedford, Massachusetts, during September, the rain falls for 10.5 days and regularly aggregates up to 1.06" (27mm) of precipitation.

When it does not snow in New Bedford?

May through October are months without snowfall in New Bedford.

How cold is the water in September in New Bedford?

In September, the average ocean temperature is 65.8°F (18.8°C). For most, swimming in 65.8°F (18.8°C) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 69.8°F (21°C) to 59°F (15°C).

What is the average length of the day in September in New Bedford?

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

When are sunrise and sunset in September in New Bedford?

On the first day of September, sunrise is at 6:10 am and sunset at 7:16 pm. On the last day of the month, sunrise is at 6:40 am and sunset at 6:26 pm EDT.

How many hours of sunshine does New Bedford have in September?

In September, the average sunshine duration in New Bedford, Massachusetts, is 8.7h.

How high is the UV index in September in New Bedford?

In September, the average daily maximum UV index in New Bedford, Massachusetts, is 4. A UV Index reading of 3 to 5 represents a medium hazard to health from unprotected exposure to UV radiation.
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
New Bedford, MA

Average temperature in September - New Bedford, MA
  • Average high temperature in September: 71.2°F

The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (36.3°F).

  • Average low temperature in September: 59.7°F

The month with the highest average low temperature is July (66.4°F).
The coldest month (with the lowest average low temperature) is January (26.8°F).

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Average pressure in September
New Bedford, MA

Average pressure in September - New Bedford, MA
  • Average pressure in September: 30.05"Hg

The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in September
New Bedford, MA

Average wind speed in September - New Bedford, MA
  • Average wind speed in September: 9mph

The windiest month (with the highest average wind speed) is January (11.9mph).
The calmest month (with the lowest average wind speed) is August (8mph).

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Average humidity in September
New Bedford, MA

Average humidity in September - New Bedford, MA
  • Average humidity in September: 78%

The months with the highest relative humidity are June and July (80%).
The months with the lowest relative humidity are March, April and November (74%).

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Average rainfall in September
New Bedford, MA

Average rainfall in September - New Bedford, MA
  • Average rainfall in September: 1.06"

The wettest month (with the highest rainfall) is October (1.93").
The driest month (with the least rainfall) is September (1.06").

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Average rainfall days in September
New Bedford, MA

Average rainfall days in September - New Bedford, MA
  • Average rainfall days in September: 10.5 days

The month with the highest number of rainy days is July (13.4 days).
The month with the least rainy days is January (8.2 days).

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Average snowfall in September
New Bedford, MA

Average snowfall in September - New Bedford, MA
  • Average snowfall in September: 0"

The month with the highest snowfall is February (1.77").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in September
New Bedford, MA

Average snowfall days in September - New Bedford, MA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (6.5 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

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Average sea temperature in September
New Bedford, MA

Average sea temperature in September - New Bedford, MA
  • Average sea temperature in September: 65.8°F

The best month for swimming (with the highest average sea temperature) is August (68.4°F).
The coldest month (with the lowest average sea temperature) is February (38.2°F).

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Average daylight in September /
Average sunshine in September
New Bedford, MA

Average daylight in September / Average sunshine in September - New Bedford, MA
  • 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 4min

The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).

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Average sunshine days in September
New Bedford, MA

Average sunshine days in September - New Bedford, MA
  • Average sunshine days in September: 16.7 days

The months with the most sunshine days are November and December (18.3 days).
The month with the least sunshine days is April (14.4 days).

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Average UV index in September
New Bedford, MA

Average UV index in September - New Bedford, MA
  • 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
New Bedford, MA

Average cloud cover in September - New Bedford, MA
  • Average cloud cover in September: 32

The month with the most cloud cover is March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 28).

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Average visibility in September
New Bedford, MA

Average visibility in September - New Bedford, MA
  • 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).

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New Bedford, Massachusetts, USA

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