September weather forecast
Brockton, MA

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Weather in September

As September arrives, Brockton experiences a noticeable shift in weather, signaling the onset of autumn. The fall climate gradually sets in and temperatures begin to cool down. Rainfall experiences a decline to 1.42" (36mm) thereby making way for drier conditions. While the scorching summer heat has passed, the city retains a pleasantly warm climate. Residents can indulge in outdoor activities and witness the fall colors begin to emerge toward the end of the month.

Temperature

During the shift to September, a minor reduction in average high-temperature is observed, shifting from a warm 81°F (27.2°C) in August to an agreeable 73°F (22.8°C). Throughout September, an average low-temperature of 56.3°F (13.5°C) is experienced.

Humidity

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

Rainfall

September is the month with the least rainfall. Rain falls for 11.4 days and accumulates 1.42" (36mm) of precipitation.

Snowfall

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

Daylight

The average length of the day in September is 12h and 28min.
On the first day of September, sunrise is at 6:10 am and sunset at 7:17 pm. On the last day of the month, sunrise is at 6:40 am and sunset at 6:26 pm EDT.

Sunshine

In Brockton, the average sunshine in September is 8.2h.

UV index

The average daily maximum UV index in September in Brockton is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: The average daily UV index of 4 in September transforms into the following instructions:
Make use of precautions - Suggestions to resist sunburn are communicated. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
Updated: Aug 23, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the usual temperature for Brockton in September?

An average high-temperature, in September, in Brockton, is 73°F (22.8°C) and the average low-temperature is 56.3°F (13.5°C). The average heat index (a.k.a. 'felt air temperature', 'feels like'), which factors the actual air temperature with the relative humidity, in August is estimated at 86°F (30°C).

What is the average humidity in September?

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

What is the driest month?

The month with the least rainfall is September, when the rain falls for 11.4 days and typically collects 1.42" (36mm) of precipitation.

How many days does it rain in September?

In Brockton, in September, during 11.4 rainfall days, 1.42" (36mm) of precipitation is typically accumulated.

When it does not snow?

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

How many hours of daylight does Brockton have in September?

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

When is the sunrise / sunset in September?

In September, on the first day of the month, sunrise is at 6:10 am and sunset at 7:17 pm. On the last day of the month, sunrise is at 6:40 am and sunset at 6:26 pm EDT.

How long on average sun shines in September?

The average sunshine duration in September is 8.2h.

What is the UV index reading in September?

In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes 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
Brockton, MA

Average temperature in September - Brockton, MA
  • Average high temperature in September: 73°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 (34.5°F).

  • Average low temperature in September: 56.3°F

The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (22.8°F).

Average pressure in September
Brockton, MA

Average pressure in September - Brockton, 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).

Average wind speed in September
Brockton, MA

Average wind speed in September - Brockton, MA
  • Average wind speed in September: 6.6mph

The windiest month (with the highest average wind speed) is March (9.1mph).
The calmest month (with the lowest average wind speed) is August (6mph).

Average humidity in September
Brockton, MA

Average humidity in September - Brockton, MA
  • Average humidity in September: 77%

The month with the highest relative humidity is February (78%).
The month with the lowest relative humidity is April (71%).

Average rainfall in September
Brockton, MA

Average rainfall in September - Brockton, MA
  • Average rainfall in September: 1.42"

The wettest month (with the highest rainfall) is December (3.11").
The driest month (with the least rainfall) is September (1.42").

Average rainfall days in September
Brockton, MA

Average rainfall days in September - Brockton, MA
  • Average rainfall days in September: 11.4 days

The month with the highest number of rainy days is July (15.9 days).
The month with the least rainy days is February (7.8 days).

Average snowfall in September
Brockton, MA

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

The month with the highest snowfall is March (4.17").
The months with the least snowfall are June, July, August, September and October (0").

Average snowfall days in September
Brockton, MA

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

The month with the highest number of snowfall days is January (7.4 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

Average daylight in September /
Average sunshine in September
Brockton, MA

Average daylight in September / Average sunshine in September - Brockton, MA
  • Average daylight in September: 12h and 3min

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).

  • Average sunshine in September: 8h and 1min

The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

Average sunshine days in September
Brockton, MA

Average sunshine days in September - Brockton, MA
  • Average sunshine days in September: 16.1 days

The month with the most sunshine days is November (17.9 days).
The month with the least sunshine days is July (13.1 days).

Average UV index in September
Brockton, MA

Average UV index in September - Brockton, 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).

Average cloud cover in September
Brockton, MA

Average cloud cover in September - Brockton, MA
  • Average cloud cover in September: 39

The month with the most cloud cover is March (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 35).

Average visibility in September
Brockton, MA

Average visibility in September - Brockton, 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).

Brockton, Massachusetts, USA

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