September weather forecast
Douglas, MA

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Weather in September

The first month of the autumn, September, is still a pleasant month in Douglas, Massachusetts, with temperature in the range of an average low of 54.5°F (12.5°C) and an average high of 72.7°F (22.6°C).

Temperature

In September, the meteorological conditions change slightly, with the average high-temperature moving from a warm 80.1°F (26.7°C) in August to a pleasant 72.7°F (22.6°C). An average low-temperature of 54.5°F (12.5°C) marks the month of September.

Humidity

The average relative humidity in September is 78%.

Rainfall

September is the month with the least rainfall. Rain falls for 12.2 days and accumulates 1.54" (39mm) of precipitation.

Snowfall

June through October are months without snowfall.

Daylight

In Douglas, the average length of the day in September is 12h and 28min.
On the first day of the month, sunrise is at 6:13 am and sunset at 7:20 pm. On the last day of September, sunrise is at 6:43 am and sunset at 6:29 pm EDT.

Sunshine

The average sunshine in September is 8.2h.

UV index

In Douglas, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: The maximum daily UV index, 4 in September, converts into the following recommendations:
Prioritize safety - Suggestions to prevent sun damage are offered. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
Updated: Aug 16, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the usual temperature for Douglas in September?

September temperatures in Douglas, Massachusetts, vary between a high-temperature of 72.7°F (22.6°C) and a low-temperature of 54.5°F (12.5°C). In July, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which represents the influence of relative humidity on air temperature, is estimated at 87.8°F (31°C).

What is the average humidity in September?

In September, the average relative humidity is 78%.

What is the driest month in Douglas?

The month with the least rainfall is September, when the rain falls for 12.2 days and typically collects 1.54" (39mm) of precipitation.

How many days does it rain in September?

In Douglas, in September, during 12.2 rainfall days, 1.54" (39mm) of precipitation is typically accumulated.

When it does not snow?

June through October are months without snowfall.

What is the average length of the day in September?

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

When is the sunrise / sunset in September?

On the first day of September, sunrise is at 6:13 am and sunset at 7:20 pm. On the last day of the month, sunrise is at 6:43 am and sunset at 6:29 pm EDT.

How many hours of sunshine does Douglas have in September?

In September, the average sunshine duration is 8.2h.

What is the UV index intensity in September?

The average daily maximum UV index in September in Douglas is 4. A UV Index reading of 3 to 5 represents a moderate health threat from exposure to the Sun's 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
Douglas, MA

Average temperature in September - Douglas, MA
  • Average high temperature in September: 72.7°F

The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (32.5°F).

  • Average low temperature in September: 54.5°F

The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (20.5°F).

Average pressure in September
Douglas, MA

Average pressure in September - Douglas, MA
  • Average pressure in September: 30.06"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
Douglas, MA

Average wind speed in September - Douglas, MA
  • Average wind speed in September: 6.2mph

The windiest months (with the highest average wind speed) are January, February and March (8.9mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).

Average humidity in September
Douglas, MA

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

The month with the highest relative humidity is February (80%).
The month with the lowest relative humidity is April (71%).

Average rainfall in September
Douglas, MA

Average rainfall in September - Douglas, MA
  • Average rainfall in September: 1.54"

The wettest month (with the highest rainfall) is December (3.15").
The driest month (with the least rainfall) is September (1.54").

Average rainfall days in September
Douglas, MA

Average rainfall days in September - Douglas, MA
  • Average rainfall days in September: 12.2 days

The month with the highest number of rainy days is July (16.8 days).
The month with the least rainy days is January (7.7 days).

Average snowfall in September
Douglas, MA

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

The month with the highest snowfall is March (4.92").
The months with the least snowfall are June, July, August, September and October (0").

Average snowfall days in September
Douglas, MA

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

The month with the highest number of snowfall days is January (8.4 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
Douglas, MA

Average daylight in September / Average sunshine in September - Douglas, 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 6min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

Average sunshine days in September
Douglas, MA

Average sunshine days in September - Douglas, MA
  • Average sunshine days in September: 15.5 days

The month with the most sunshine days is November (18 days).
The month with the least sunshine days is July (11.8 days).

Average UV index in September
Douglas, MA

Average UV index in September - Douglas, 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
Douglas, MA

Average cloud cover in September - Douglas, MA
  • Average cloud cover in September: 40

The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 36).

Average visibility in September
Douglas, MA

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

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

Douglas, Massachusetts, USA

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