September weather forecast
Manomet, MA

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Weather in September

September, the first month of the autumn in Manomet, is still a pleasant month, with an average temperature varying between 59.7°F (15.4°C) and 70.2°F (21.2°C).

Temperature

A moderate decline in average high-temperatures is noted in September, moving from a warm 76.6°F (24.8°C) in August to a pleasant 70.2°F (21.2°C). In September, the temperature drops to an average of 59.7°F (15.4°C) at night.

Humidity

In September, the average relative humidity is 78%.

Rainfall

In September, the rain falls for 11 days. Throughout September, 1.1" (28mm) of precipitation is accumulated. Throughout the year, there are 132.2 rainfall days, and 16.3" (414mm) of precipitation is accumulated.

Snowfall

In Manomet, snow does not fall in May through October.

Daylight

In September, the average length of the day is 12h and 28min.
On the first day of the month, sunrise is at 6:08 am and sunset at 7:15 pm. On the last day of September, in Manomet, Massachusetts, sunrise is at 6:38 am and sunset at 6:25 pm EDT.

Sunshine

The average sunshine in September is 8.6h.

UV index

In Manomet, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the average person.
Note: The UV index of 4 during September translates into the following guidance:
Heed the precautions - Protecting the skin and eyes from damage is compulsory. To guard against the harmful effects of the Sun, minimize exposure during midday. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Updated: Aug 16, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the temperature in September?

The high-temperature during September is 70.2°F (21.2°C) and the low-temperature is 59.7°F (15.4°C).

What is the average humidity in September?

The average relative humidity in September is 78%.

How much does it rain in September?

In Manomet, in September, during 11 rainfall days, 1.1" (28mm) of precipitation is typically accumulated.

When it does not snow?

In Manomet, snow does not fall in May through October.

What is the average length of the day in September?

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

What time are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 6:08 am and sunset at 7:15 pm. On the last day of the month, sunrise is at 6:38 am and sunset at 6:25 pm EDT.

How many hours of sunshine does Manomet have in September?

In September, the average sunshine duration is 8.6h.

What is the UV index reading in September?

The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from exposure to Sun's UV rays.
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
Manomet, MA

Average temperature in September - Manomet, MA
  • Average high temperature in September: 70.2°F

The warmest month (with the highest average high temperature) is July (77.5°F).
The month with the lowest average high temperature is January (35.8°F).

  • Average low temperature in September: 59.7°F

The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).

Average pressure in September
Manomet, MA

Average pressure in September - Manomet, 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
Manomet, MA

Average wind speed in September - Manomet, MA
  • Average wind speed in September: 9.1mph

The windiest month (with the highest average wind speed) is January (12.3mph).
The calmest month (with the lowest average wind speed) is August (7.8mph).

Average humidity in September
Manomet, MA

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

The month with the highest relative humidity is July (80%).
The months with the lowest relative humidity are March, April and November (74%).

Average rainfall in September
Manomet, MA

Average rainfall in September - Manomet, MA
  • Average rainfall in September: 1.1"

The wettest months (with the highest rainfall) are July and October (1.65").
The driest month (with the least rainfall) is February (1.02").

Average rainfall days in September
Manomet, MA

Average rainfall days in September - Manomet, MA
  • Average rainfall days in September: 11 days

The month with the highest number of rainy days is July (14 days).
The month with the least rainy days is January (7.4 days).

Average snowfall in September
Manomet, MA

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

The month with the highest snowfall is March (1.77").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in September
Manomet, MA

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

The month with the highest number of snowfall days is January (7.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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

Average daylight in September / Average sunshine in September - Manomet, 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 36min).
The months with the least sunshine are February and December (Average sunshine: 4h and 42min).

Average sunshine days in September
Manomet, MA

Average sunshine days in September - Manomet, MA
  • Average sunshine days in September: 17 days

The month with the most sunshine days is December (18.5 days).
The month with the least sunshine days is July (14.8 days).

Average UV index in September
Manomet, MA

Average UV index in September - Manomet, 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
Manomet, MA

Average cloud cover in September - Manomet, MA
  • Average cloud cover in September: 33

The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 29).

Average visibility in September
Manomet, MA

Average visibility in September - Manomet, 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).

Manomet, Massachusetts, USA

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