September weather forecast and climate
Attleboro, MA

Weather in September

The first month of the autumn, September, is still a pleasant month in Attleboro, Massachusetts, with average temperature ranging between max 72.9°F (22.7°C) and min 56.1°F (13.4°C).

Temperature

In September, the average high-temperature slightly decreases, 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, Massachusetts, is 56.1°F (13.4°C).

Humidity

Months with the highest humidity are February, June, September and October, with an average relative humidity of 78%.

Rainfall

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.

Snowfall

In Attleboro snow does not fall in June through October.

Daylight

In Attleboro, Massachusetts, the average length of the day in September is 12.5h.

Sunshine

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

UV index

The average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to the UV radiation for ordinary individuals.
Note: The average daily UV index of 4 in September transform into the following instructions:
Take precautions - Protection against sun damage is advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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 Attleboro, Massachusetts, in September, the average high-temperature is 72.9°F (22.7°C), and the average low-temperature is 56.1°F (13.4°C).

What are the most humid months 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?

The average relative humidity in September in Attleboro is 78%.

How many days does it rain in September in Attleboro?

In Attleboro, during September, the rain falls for 11.5 days and regularly aggregates up to 1.34" (34mm) of precipitation.

What is the driest month in Attleboro?

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

When it does not snow in Attleboro?

In Attleboro snow does not fall in June through October.

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

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

How many hours of sunshine does Attleboro have in September?

The average sunshine in September in Attleboro, Massachusetts, is 8.4h.

How high is the UV index in September in Attleboro?

In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium health risk from the exposure to the Sun's UV rays.

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"

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

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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%

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").
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).
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: 12.5h

The month with the longest days is June (Average daylight: 15.2h).
The month with the shortest days is December (Average daylight: 9.2h).

  • Average sunshine in September: 8.4h

The month with the most sunshine is August (Average sunshine: 10.4h).
The month with the least sunshine is February (Average sunshine: 4.7h).

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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

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
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

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

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