September weather forecast and climate
Great Barrington, MA

The colorful ancient stone building that hosts the town hall of Great Barrington in Massachusetts
The colorful ancient stone building that hosts the town hall of Great Barrington in Massachusetts

Weather in September

The first month of the autumn, September, is also an agreeable month in Great Barrington, Massachusetts, with average temperature varying between 51.3°F (10.7°C) and 70.9°F (21.6°C).

Temperature

In Great Barrington, Massachusetts, the average high-temperature in September marginally drops, from a warm 78.4°F (25.8°C) in August, to an agreeable 70.9°F (21.6°C). The average low-temperature, in September, is 51.3°F (10.7°C).

Humidity

The average relative humidity in Great Barrington is 80%.

Rainfall

In Great Barrington, during September, the rain falls for 12.7 days and regularly aggregates up to 2.24" (57mm) of precipitation. Throughout the year, in Great Barrington, there are 157.8 rainfall days, and 31.69" (805mm) of precipitation is accumulated.

Snowfall

In Great Barrington snow does not fall in June through September.

Daylight

The average length of the day in Great Barrington, Massachusetts, is 12.5h.

Sunshine

In Great Barrington, the average sunshine in September is 8.5h.

UV index

In Great Barrington, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from the exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 4 in September transform into the following instructions:
Take precautions - Protection against sunburn is recommended. 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 Great Barrington?

In Great Barrington, the average relative humidity in September is 80%.

How much does it rain in Great Barrington in September?

In Great Barrington, Massachusetts, during September, the rain falls for 12.7 days and regularly aggregates up to 2.24" (57mm) of precipitation.

When it does not snow in Great Barrington?

In Great Barrington snow does not fall in June through September.

Does it snow in Great Barrington in September?

In Great Barrington, in September, it doesn't snow. In October, it regularly snows.

What is the average length of the day in September in Great Barrington?

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

How long on average sun shines in September in Great Barrington?

In September, the average sunshine is 8.5h.

What is the UV index reading in September in Great Barrington?

The average daily maximum UV index in September in Great Barrington, Massachusetts, is 4. A UV Index estimate of 3 to 5 represents a moderate vulnerability from unprotected exposure to the UV radiation.

Average temperature in September
Great Barrington, MA

Average temperature in September - Great Barrington, MA
  • Average high temperature in September: 70.9°F

The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (29.1°F).

  • Average low temperature in September: 51.3°F

The month with the highest average low temperature is July (59.4°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).

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Average pressure in September
Great Barrington, MA

Average pressure in September - Great Barrington, MA
  • Average pressure in September: 30.06"

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
Great Barrington, MA

Average wind speed in September - Great Barrington, MA
  • Average wind speed in September: 5.6mph

The windiest months (with the highest average wind speed) are January and March (8.4mph).
The calmest months (with the lowest average wind speed) are July and August (5.2mph).

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Average humidity in September
Great Barrington, MA

Average humidity in September - Great Barrington, MA
  • Average humidity in September: 80%

The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is April (75%).

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Average rainfall in September
Great Barrington, MA

Average rainfall in September - Great Barrington, MA
  • Average rainfall in September: 2.24"

The wettest month (with the highest rainfall) is October (3.03").
The driest month (with the least rainfall) is January (2.13").

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Average rainfall days in September
Great Barrington, MA

Average rainfall days in September - Great Barrington, MA
  • Average rainfall days in September: 12.7 days

The month with the highest number of rainy days is May (16.6 days).
The month with the least rainy days is January (8.2 days).

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Average snowfall in September
Great Barrington, MA

Average snowfall in September - Great Barrington, MA
  • Average snowfall in September: 0"

The month with the highest snowfall is February (6.89").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Great Barrington, MA

Average snowfall days in September - Great Barrington, MA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (13.2 days).
Months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in September /
Average sunshine in September
Great Barrington, MA

Average daylight in September / Average sunshine in September - Great Barrington, 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: 8.5h

Months with the most sunshine are July and August (Average sunshine: 10h).
The month with the least sunshine is February (Average sunshine: 3.9h).

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Average sunshine days in September
Great Barrington, MA

Average sunshine days in September - Great Barrington, MA
  • Average sunshine days in September: 15.5 days

Months with the most sunshine days are September and November (15.5 days).
The month with the least sunshine days is February (11.1 days).

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Average UV index in September
Great Barrington, MA

Average UV index in September - Great Barrington, MA
  • Average UV index in September: 4

Months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is December (UV index 1).

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Average cloud cover in September
Great Barrington, MA

Average cloud cover in September - Great Barrington, MA
  • Average cloud cover in September: 40

The month with the most cloud cover is February (Cloud cover 57).
Months with the least cloud cover are July and August (Cloud cover 37).

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Average visibility in September
Great Barrington, MA

Average visibility in September - Great Barrington, MA
  • Average visibility in September: 5mi

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

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