September weather forecast and climate
Monument Beach, MA

Weather in September

September, the first month of the autumn, in Monument Beach, is also an agreeable month, with average temperature varying between 68.9°F (20.5°C) and 61.2°F (16.2°C).

Temperature

In September, the average high-temperature marginally drops, from a warm 75.2°F (24°C) in August, to a pleasant 68.9°F (20.5°C). In September, in Monument Beach, the average low-temperature is 61.2°F (16.2°C).

Humidity

In Monument Beach, Massachusetts, the average relative humidity in September is 79%.

Rainfall

The month with the least rainfall is September when the rain falls for 12.3 days and typically collects 1.81" (46mm) of precipitation.

Snowfall

May through September are months without snowfall.

Ocean temperature

In Monument Beach, in September, the average water temperature is 65.8°F (18.8°C).
Note: Swimming in 65.8°F (18.8°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).

Daylight

The average length of the day in Monument Beach is 12.5h.

Sunshine

In Monument Beach, the average sunshine is 8.7h.

UV index

In September, the average daily maximum UV index in Monument Beach, Massachusetts, is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to the UV radiation for ordinary individuals.
Note: The daily maximum UV index of 4 interpret into the following advice:
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. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the average humidity in September in Monument Beach?

In September, the average relative humidity is 79%.

What is the driest month in Monument Beach?

The month with the least rainfall in Monument Beach, Massachusetts, is September when the rain falls for 12.3 days and typically collects 1.81" (46mm) of precipitation.

How much does it rain in Monument Beach in September?

In September, in Monument Beach, Massachusetts, the rain falls for 12.3 days. Throughout September, 1.81" (46mm) of precipitation is accumulated.

When it does not snow in Monument Beach?

May through September are months without snowfall.

Does it snow in Monument Beach in September?

In Monument Beach, in September, it doesn't snow. In October, it regularly snows.

What is the ocean temperature in September in Monument Beach?

In September, the average ocean temperature in Monument Beach is 65.8°F (18.8°C). For most, swimming in 65.8°F (18.8°C) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 69.8°F (21°C) to 59°F (15°C).

What is the average length of the day in September in Monument Beach?

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

How long on average sun shines in September in Monument Beach?

In September, the average sunshine is 8.7h.

How high is the UV index in September in Monument Beach?

The average daily maximum UV index in September in Monument Beach, Massachusetts, is 4. A UV Index reading of 3 to 5 represents a moderate vulnerability from unsafe exposure to the Sun's UV rays.

Average temperature in September
Monument Beach, MA

Average temperature in September - Monument Beach, MA
  • Average high temperature in September: 68.9°F

The warmest month (with the highest average high temperature) is July (75.6°F).
The month with the lowest average high temperature is January (36.9°F).

  • Average low temperature in September: 61.2°F

The month with the highest average low temperature is August (66.7°F).
The coldest month (with the lowest average low temperature) is January (27.7°F).

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Average pressure in September
Monument Beach, MA

Average pressure in September - Monument Beach, MA
  • Average pressure in September: 30.05"

The month with the highest atmospheric pressure is November (30.06").
The month with the lowest atmospheric pressure is June (29.93").

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Average wind speed in September
Monument Beach, MA

Average wind speed in September - Monument Beach, MA
  • Average wind speed in September: 10.3mph

The windiest month (with the highest average wind speed) is January (13.7mph).
The calmest month (with the lowest average wind speed) is August (8.7mph).

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Average humidity in September
Monument Beach, MA

Average humidity in September - Monument Beach, MA
  • Average humidity in September: 79%

Months with the highest relative humidity are June and July (81%).
Months with the lowest relative humidity are March and November (74%).

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Average rainfall in September
Monument Beach, MA

Average rainfall in September - Monument Beach, MA
  • Average rainfall in September: 1.81"

The wettest month (with the highest rainfall) is December (3.58").
The driest month (with the least rainfall) is September (1.81").

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Average rainfall days in September
Monument Beach, MA

Average rainfall days in September - Monument Beach, MA
  • Average rainfall days in September: 12.3 days

The month with the highest number of rainy days is July (16 days).
The month with the least rainy days is January (9 days).

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Average snowfall in September
Monument Beach, MA

Average snowfall in September - Monument Beach, MA
  • Average snowfall in September: 0"

Months with the highest snowfall are February and March (2.28").
Months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in September
Monument Beach, MA

Average snowfall days in September - Monument Beach, MA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (6 days).
Months with the least snowfall days are May, June, July, August and September (0 days).

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Average sea temperature in September
Monument Beach, MA

Average sea temperature in September - Monument Beach, MA
  • Average sea temperature in September: 65.8°F

The best month for swimming (with the highest average sea temperature) is August (68.4°F).
The coldest month (with the lowest average sea temperature) is February (38.2°F).

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Average daylight in September /
Average sunshine in September
Monument Beach, MA

Average daylight in September / Average sunshine in September - Monument Beach, 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: 8.7h

The month with the most sunshine is August (Average sunshine: 10.7h).
Months with the least sunshine are February and December (Average sunshine: 4.8).

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Average sunshine days in September
Monument Beach, MA

Average sunshine days in September - Monument Beach, MA
  • Average sunshine days in September: 15.4 days

The month with the most sunshine days is November (16.3 days).
The month with the least sunshine days is April (12.5 days).

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Average UV index in September
Monument Beach, MA

Average UV index in September - Monument Beach, MA
  • Average UV index in September: 4

Months with the highest UV index are 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
Monument Beach, MA

Average cloud cover in September - Monument Beach, MA
  • Average cloud cover in September: 32

The month with the most cloud cover is March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 28).

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Average visibility in September
Monument Beach, MA

Average visibility in September - Monument Beach, MA
  • Average visibility in September: 6mi

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

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