September weather forecast
Attleboro, MA

Weather in September

September, the first month of the autumn in Attleboro, is also an agreeable month, with an average temperature varying between 72.9°F (22.7°C) and 56.1°F (13.4°C).

Temperature

In Attleboro, the average high-temperature in September marginally drops from a warm 80.4°F (26.9°C) in August to an agreeable 72.9°F (22.7°C). The average low-temperature, in Attleboro, is 56.1°F (13.4°C).

Humidity

The months with the highest humidity in Attleboro are February, June, September and October, with an average relative humidity of 78%.

Rainfall

September is the month with the least rainfall in Attleboro. Rain falls for 11.5 days and accumulates 1.34" (34mm) of precipitation.

Snowfall

June through October are months without snowfall.

Daylight

In September, the average length of the day in Attleboro is 12h and 28min.
On the first day of the month, sunrise is at 6:10 am and sunset at 7:19 pm. On the last day of September, sunrise is at 6:40 am and sunset at 6:29 pm EDT.

Sunshine

In September, the average sunshine in Attleboro is 8.4h.

UV index

In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 4 in September interpret into the following advice:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in September in Attleboro?

In September, in Attleboro, Massachusetts, the average high-temperature is 72.9°F (22.7°C), and the average low-temperature is 56.1°F (13.4°C). The average heat index (a.k.a. 'feels like', 'apparent temperature'), which represents the influence of relative humidity on air temperature, in July is estimated at 87.8°F (31°C).

What is the most humid month in Attleboro?

February, June, September and October, with an average relative humidity of 78%, are most humid months in Attleboro.

What is the average humidity in September in Attleboro?

In September, the average relative humidity is 78%.

What is the driest month in Attleboro?

The month with the least rainfall in Attleboro is September, when the rain falls for 11.5 days and typically collects 1.34" (34mm) of precipitation.

How many days does it rain in September in Attleboro?

In Attleboro, in September, during 11.5 rainfall days, 1.34" (34mm) of precipitation is typically accumulated.

When it does not snow in Attleboro?

In Attleboro, Massachusetts, snow does not fall in June through October.

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

The average day length in September in Attleboro, Massachusetts, is 12h and 28min.

When are sunrise and sunset in September in Attleboro?

On the first day of September in Attleboro, sunrise is at 6:10 am and sunset at 7:19 pm. On the last day of the month, sunrise is at 6:40 am and sunset at 6:29 pm EDT.

How long on average sun shines in September in Attleboro?

The average sunshine duration in September in Attleboro is 8.4h.

What is the UV index reading in September in Attleboro?

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

Average temperature in September
Attleboro, MA

Average temperature in September - Attleboro, MA
  • Average high temperature in September: 72.9°F

The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (34.3°F).

  • Average low temperature in September: 56.1°F

The month with the highest average low temperature is July (63.7°F).
The coldest month (with the lowest average low temperature) is January (22.5°F).

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Average pressure in September
Attleboro, MA

Average pressure in September - Attleboro, 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
Attleboro, MA

Average wind speed in September - Attleboro, MA
  • Average wind speed in September: 6.7mph

The windiest months (with the highest average wind speed) are February and March (9.3mph).
The calmest month (with the lowest average wind speed) is August (6.1mph).

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Average humidity in September
Attleboro, MA

Average humidity in September - Attleboro, MA
  • Average humidity in September: 78%

The months with the highest relative humidity are February, June, September and October (78%).
The month with the lowest relative humidity is April (71%).

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Average rainfall in September
Attleboro, MA

Average rainfall in September - Attleboro, MA
  • Average rainfall in September: 1.34"

The wettest month (with the highest rainfall) is April (3.11").
The driest month (with the least rainfall) is September (1.34").

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Average rainfall days in September
Attleboro, MA

Average rainfall days in September - Attleboro, MA
  • Average rainfall days in September: 11.5 days

The month with the highest number of rainy days is May (15.8 days).
The month with the least rainy days is January (8.3 days).

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Average snowfall in September
Attleboro, MA

Average snowfall in September - Attleboro, MA
  • Average snowfall in September: 0"

The month with the highest snowfall is March (4.06").
The months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in September
Attleboro, MA

Average snowfall days in September - Attleboro, MA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (7.8 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
Attleboro, MA

Average daylight in September / Average sunshine in September - Attleboro, MA
  • Average daylight in September: 12h and 28min

The month with the longest days is June (Average daylight: 15h and 11min).
The month with the shortest days is December (Average daylight: 9h and 11min).

  • Average sunshine in September: 8h and 24min

The month with the most sunshine is 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
Attleboro, MA

Average sunshine days in September - Attleboro, MA
  • Average sunshine days in September: 15.8 days

The month with the most sunshine days is November (17.9 days).
The month with the least sunshine days is April (12.8 days).

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Average UV index in September
Attleboro, MA

Average UV index in September - Attleboro, 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
Attleboro, MA

Average cloud cover in September - Attleboro, MA
  • Average cloud cover in September: 38

The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 34).

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Average visibility in September
Attleboro, MA

Average visibility in September - Attleboro, MA
  • Average visibility in September: 5mi

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

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