September weather forecast
Avalon, NJ

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Weather in September

September brings a hint of upcoming autumn to Avalon, New Jersey, as days grow shorter and leaves start turning color. Despite this, the weather remains largely warm, extending summer activities into this month. The pleasant day temperatures invite further outdoor explorations before the arrival of cold weather. The sea temperature remains attractive for water activities. It's noteworthy that rainfall in September drops to 0.55" (14mm), the lowest since April.

Temperature

Avalon in September experiences a gentle temperature dip, with average high-temperatures reducing from 79.2°F (26.2°C) in August to a still warm 73.8°F (23.2°C). Night temperatures during September in Avalon stabilize at an average of 67.5°F (19.7°C), closely mirroring the daytime temperatures.

Humidity

In Avalon, the average relative humidity in September is 77%.

Rainfall

In September, in Avalon, New Jersey, the rain falls for 9.1 days. Throughout September, 0.55" (14mm) of precipitation is accumulated. In Avalon, during the entire year, the rain falls for 112.7 days and collects up to 8.94" (227mm) of precipitation.

Snowfall

In Avalon, snow does not fall in April through November.

Ocean temperature

In Avalon, in September, the average water temperature is 72.1°F (22.3°C).
Note: Imagine a swim in 72.1°F (22.3°C) waters. How you'd feel depends on your cold sensitivity, the sun's rays, the caress of the wind, and the warmth enveloping you. Comparatively, Olympic swimmers train in waters between 77°F (25°C) and 82.4°F (28°C).

Daylight

The average length of the day in September is 12h and 26min.
On the first day of September, sunrise is at 6:28 am and sunset at 7:29 pm. On the last day of the month, sunrise is at 6:54 am and sunset at 6:42 pm EDT.

Sunshine

In Avalon, the average sunshine in September is 9.5h.

UV index

In September, the average daily maximum UV index in Avalon is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the average person.
Note: In September, a daily UV index of 5 turns into the following recommendations:
Make use of precautions - Shielding skin and eyes from injury is a requirement. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Caution! The reflection of sand and water significantly amplifies the Sun's UV radiation.
Updated: Feb 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are September temperatures in Avalon?

An average high-temperature, in September, in Avalon, is 73.8°F (23.2°C) and the average low-temperature is 67.5°F (19.7°C).

What is the average humidity in September in Avalon?

In Avalon, New Jersey, the average relative humidity in September is 77%.

How many days does it rain in September in Avalon?

In Avalon, in September, during 9.1 rainfall days, 0.55" (14mm) of precipitation is typically accumulated.

When it does not snow in Avalon?

In Avalon, New Jersey, snow does not fall in April through November.

What is the ocean temperature in September in Avalon?

In September, the average ocean temperature in Avalon is 72.1°F (22.3°C). For individuals prone to feeling cold, swimming in 73.4°F (23°C) is still regarded as intolerable. A wetsuit is not a necessity, but sunshine, wind, and air temperature are essential factors for relishing swimming at 72.1°F (22.3°C).

How many hours of daylight does Avalon have in September?

In September, the average day length in Avalon is 12h and 26min.

When are sunrise and sunset in September in Avalon?

On the first day of September in Avalon, sunrise is at 6:28 am and sunset at 7:29 pm. On the last day of the month, sunrise is at 6:54 am and sunset at 6:42 pm EDT.

How long on average sun shines in September in Avalon?

The average sunshine duration in September in Avalon is 9.5h.

How high is the UV index in September in Avalon?

The average daily maximum UV index in September in Avalon is 5. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from unsafe 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
Avalon, NJ

Average temperature in September - Avalon, NJ
  • Average high temperature in September: 73.8°F

The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (40.6°F).

  • Average low temperature in September: 67.5°F

The month with the highest average low temperature is July (73.4°F).
The coldest month (with the lowest average low temperature) is January (32.7°F).

Average pressure in September
Avalon, NJ

Average pressure in September - Avalon, NJ
  • Average pressure in September: 30.04"Hg

The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

Average wind speed in September
Avalon, NJ

Average wind speed in September - Avalon, NJ
  • Average wind speed in September: 10.8mph

The windiest month (with the highest average wind speed) is January (13.5mph).
The calmest months (with the lowest average wind speed) are July and August (9.1mph).

Average humidity in September
Avalon, NJ

Average humidity in September - Avalon, NJ
  • Average humidity in September: 77%

The month with the highest relative humidity is May (81%).
The month with the lowest relative humidity is November (73%).

Average rainfall in September
Avalon, NJ

Average rainfall in September - Avalon, NJ
  • Average rainfall in September: 0.55"

The wettest months (with the highest rainfall) are May and June (0.98").
The driest month (with the least rainfall) is January (0.39").

Average rainfall days in September
Avalon, NJ

Average rainfall days in September - Avalon, NJ
  • Average rainfall days in September: 9.1 days

The month with the highest number of rainy days is July (12.7 days).
The month with the least rainy days is November (5.9 days).

Average snowfall in September
Avalon, NJ

Average snowfall in September - Avalon, NJ
  • Average snowfall in September: 0"

The month with the highest snowfall is February (0.24").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").

Average snowfall days in September
Avalon, NJ

Average snowfall days in September - Avalon, NJ
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (2.8 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

Average sea temperature in September
Avalon, NJ

Average sea temperature in September - Avalon, NJ
  • Average sea temperature in September: 72.1°F

The best month for swimming (with the highest average sea temperature) is August (76.5°F).
The coldest month (with the lowest average sea temperature) is February (40.3°F).

Average daylight in September /
Average sunshine in September
Avalon, NJ

Average daylight in September / Average sunshine in September - Avalon, NJ
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in September: 9h and 3min

The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).

Average sunshine days in September
Avalon, NJ

Average sunshine days in September - Avalon, NJ
  • Average sunshine days in September: 18.8 days

The months with the most sunshine days are January and November (22.3 days).
The month with the least sunshine days is July (15.6 days).

Average UV index in September
Avalon, NJ

Average UV index in September - Avalon, NJ
  • Average UV index in September: 5

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 and December (UV index 2).

Average cloud cover in September
Avalon, NJ

Average cloud cover in September - Avalon, NJ
  • Average cloud cover in September: 29

The month with the most cloud cover is February (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 24).

Average visibility in September
Avalon, NJ

Average visibility in September - Avalon, NJ
  • 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).

Avalon, New Jersey, USA

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