September weather forecast
South Seaville, NJ

Share

Weather in September

September, the first month of the autumn in South Seaville, is also a moderately hot month, with an average temperature varying between 66.2°F (19°C) and 73.9°F (23.3°C).

Temperature

September is marked by a subtle drop in average high-temperatures, transitioning from a warm 79.9°F (26.6°C) in August to a still moderately hot 73.9°F (23.3°C). South Seaville's nighttime temperature in September consistently rests at a comfortable 66.2°F (19°C).

Humidity

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

Rainfall

In South Seaville, during September, the rain falls for 10.6 days and regularly aggregates up to 0.91" (23mm) of precipitation. Throughout the year, there are 130.8 rainfall days, and 13.23" (336mm) of precipitation is accumulated.

Snowfall

In South Seaville, snow does not fall in April through October.

Daylight

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

Sunshine

In September, the average sunshine is 9.5h.

UV index

In South Seaville, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for average individuals.
Note: In September, a regular UV index of 5 translates into these guidelines:
Guard yourself - Avoiding sunburn is suggested. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
Updated: Jul 19, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the usual temperature for South Seaville in September?

The average high-temperature and low-temperature during September are 73.9°F (23.3°C) and 66.2°F (19°C) respectively. In July, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which combines air temperature and relative humidity, is evaluated at 86°F (30°C).

What is the average humidity in September?

The average relative humidity in September is 77%.

How much does it rain in September?

In South Seaville, during September, the rain falls for 10.6 days and regularly aggregates up to 0.91" (23mm) of precipitation.

When it does not snow?

In South Seaville, snow does not fall in April through October.

What is the average length of the day in September?

The average day length in September is 12h and 26min.

When are sunrise and sunset in September?

In September, on the first day of the month, 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 many hours of sunshine does South Seaville have in September?

In September, the average sunshine duration is 9.5h.

How high is the UV index in September?

In South Seaville, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate health threat from unprotected exposure to 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
South Seaville, NJ

Average temperature in September - South Seaville, NJ
  • Average high temperature in September: 73.9°F

The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (40.1°F).

  • Average low temperature in September: 66.2°F

The month with the highest average low temperature is July (72.1°F).
The coldest month (with the lowest average low temperature) is January (31.3°F).

Average pressure in September
South Seaville, NJ

Average pressure in September - South Seaville, 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
South Seaville, NJ

Average wind speed in September - South Seaville, NJ
  • Average wind speed in September: 9.5mph

The windiest month (with the highest average wind speed) is January (11.9mph).
The calmest months (with the lowest average wind speed) are July and August (8.1mph).

Average humidity in September
South Seaville, NJ

Average humidity in September - South Seaville, 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
South Seaville, NJ

Average rainfall in September - South Seaville, NJ
  • Average rainfall in September: 0.91"

The wettest month (with the highest rainfall) is August (1.61").
The driest month (with the least rainfall) is January (0.67").

Average rainfall days in September
South Seaville, NJ

Average rainfall days in September - South Seaville, NJ
  • Average rainfall days in September: 10.6 days

The month with the highest number of rainy days is July (15.2 days).
The month with the least rainy days is January (7 days).

Average snowfall in September
South Seaville, NJ

Average snowfall in September - South Seaville, NJ
  • Average snowfall in September: 0"

The month with the highest snowfall is January (0.59").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in September
South Seaville, NJ

Average snowfall days in September - South Seaville, NJ
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (4.7 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

Average daylight in September /
Average sunshine in September
South Seaville, NJ

Average daylight in September / Average sunshine in September - South Seaville, 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
South Seaville, NJ

Average sunshine days in September - South Seaville, NJ
  • Average sunshine days in September: 17.4 days

The month with the most sunshine days is November (20.4 days).
The month with the least sunshine days is July (13.4 days).

Average UV index in September
South Seaville, NJ

Average UV index in September - South Seaville, 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
South Seaville, NJ

Average cloud cover in September - South Seaville, 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 25).

Average visibility in September
South Seaville, NJ

Average visibility in September - South Seaville, 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).

South Seaville, New Jersey, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location