September weather forecast
Monument Beach, MA

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Weather in September

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

Temperature

September is marked by a subtle drop in average high-temperatures, transitioning from a warm 75.2°F (24°C) in August to an agreeable 68.9°F (20.5°C). In September, a low-temperature average of 61.2°F (16.2°C) is characteristic of Monument Beach, marking a minor shift from daytime temperatures.

Humidity

The average relative humidity in September is 79%.

Rainfall

September is the month with the least rainfall. Rain falls for 12.3 days and accumulates 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: The enjoyment of swimming decreases for most when the surface water temperature is 65.8°F (18.8°C). Breathing control becomes increasingly challenging as temperatures descend below 69.8°F (21°C).

Daylight

In September, the average length of the day is 12h and 28min.
On the first day of the month, sunrise is at 6:09 am and sunset at 7:15 pm. On the last day of September, sunrise is at 6:38 am and sunset at 6:25 pm EDT.

Sunshine

The average sunshine in September is 8.7h.

UV index

In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for average individuals.
Note: In September, the maximum UV index of 4 suggests this advice:
Prioritize safety - Suggestions to prevent sun damage are offered. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Experience reduced UV exposure by about half when donning a wide-brim hat.
Updated: Jul 27, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the usual temperature for Monument Beach in September?

The high-temperature, in September, in Monument Beach, is 68.9°F (20.5°C), while the low-temperature averages to 61.2°F (16.2°C).

What is the average humidity in September?

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

What is the driest month?

September is the month with the least rainfall. Rain falls for 12.3 days and accumulates 1.81" (46mm) of precipitation.

How much does it rain in September?

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

When it does not snow?

May through September are months without snowfall.

Does it snow in September?

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

How cold is the water in September?

In September, the average ocean temperature is 65.8°F (18.8°C). 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).

How many hours of daylight does Monument Beach have in September?

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

What time are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 6:09 am and sunset at 7:15 pm. On the last day of the month, in Monument Beach, sunrise is at 6:38 am and sunset at 6:25 pm EDT.

How many hours of sunshine does Monument Beach have in September?

In Monument Beach, the average sunshine duration in September is 8.7h.

What is the UV index intensity in September?

In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a moderate vulnerability 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
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).

Average pressure in September
Monument Beach, MA

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

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

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).

Average humidity in September
Monument Beach, MA

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

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

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").

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).

Average snowfall in September
Monument Beach, MA

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

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

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).
The months with the least snowfall days are May, June, July, August and September (0 days).

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).

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: 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 4min

The month with the most sunshine is August (Average sunshine: 10h and 42min).
The months with the least sunshine are February and December (Average sunshine: 4h and 48min).

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).

Average UV index in September
Monument Beach, MA

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

The months with the highest UV index are 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
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).

Average visibility in September
Monument Beach, MA

Average visibility in September - Monument Beach, 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).

Monument Beach, Massachusetts, USA

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