September weather forecast
Sewaren, NJ

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Weather in September

September, the first month of the autumn in Sewaren, is also a moderately hot month, with temperature in the range of an average high of 75°F (23.9°C) and an average low of 61.9°F (16.6°C).

Temperature

With the arrival of September, Sewaren experiences a modest decline in average high-temperatures, transitioning from 81.3°F (27.4°C) in August to a still warm 75°F (23.9°C). Sewaren's temperature in September lowers to a consistent average of 61.9°F (16.6°C) during the nights.

Humidity

In Sewaren, the average relative humidity in September is 75%.

Rainfall

September is the month with the least rainfall. Rain falls for 12.8 days and accumulates 1.81" (46mm) of precipitation.

Snowfall

In Sewaren, New Jersey, snow does not fall in May through September.

Ocean temperature

In September, the average ocean temperature is 70.2°F (21.2°C).
Note: Most people find swimming in 70.2°F (21.2°C) to be not enjoyable. The control of one's breathing becomes more challenging as the water temperature drops below 69.8°F (21°C).

Daylight

In September, the average length of the day is 12h and 27min.
On the first day of the month, sunrise is at 6:24 am and sunset at 7:28 pm. On the last day of September, in Sewaren, sunrise is at 6:53 am and sunset at 6:40 pm EDT.

Sunshine

In Sewaren, the average sunshine in September is 8.7h.

UV index

The average daily maximum UV index in September in Sewaren is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for ordinary individuals.
Note: In September, a daily maximum UV index of 5 leads to the following instructions:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Attention! UV strength is notably upped by the reflection of sand and water.
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Frequently asked questions

What is the average September temperature in Sewaren?

The average high-temperature, in September, in Sewaren, is 75°F (23.9°C), while the average low-temperature is 61.9°F (16.6°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which combines air temperature and relative humidity, in August is estimated at 86°F (30°C).

What is the average humidity in September in Sewaren?

The average relative humidity in September in Sewaren, New Jersey, is 75%.

What is the driest month in Sewaren?

The month with the least rainfall is September, when the rain falls for 12.8 days and typically collects 1.81" (46mm) of precipitation.

How much does it rain in Sewaren in September?

In Sewaren, New Jersey, in September, it is raining for 12.8 days, with typically 1.81" (46mm) of accumulated precipitation.

When it does not snow in Sewaren?

May through September are months without snowfall.

Does it snow in Sewaren in September?

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

What is the ocean temperature in September in Sewaren?

In Sewaren, New Jersey, in September, the average water temperature is 70.2°F (21.2°C). For most, swimming in 70.2°F (21.2°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).

How many hours of daylight does Sewaren have in September?

In Sewaren, New Jersey, the average day length in September is 12h and 27min.

When is the sunrise / sunset in September in Sewaren?

On the first day of September in Sewaren, New Jersey, sunrise is at 6:24 am and sunset at 7:28 pm. On the last day of the month, sunrise is at 6:53 am and sunset at 6:40 pm EDT.

How many hours of sunshine does Sewaren have in September?

In September, the average sunshine duration is 8.7h.

What is the UV index reading in September in Sewaren?

In Sewaren, New Jersey, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium hazard to health 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
Sewaren, NJ

Average temperature in September - Sewaren, NJ
  • Average high temperature in September: 75°F

The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (36.9°F).

  • Average low temperature in September: 61.9°F

The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is January (25.9°F).

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Average pressure in September
Sewaren, NJ

Average pressure in September - Sewaren, NJ
  • Average pressure in September: 30.05"Hg

The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in September
Sewaren, NJ

Average wind speed in September - Sewaren, NJ
  • Average wind speed in September: 7.3mph

The windiest month (with the highest average wind speed) is January (10.2mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).

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Average humidity in September
Sewaren, NJ

Average humidity in September - Sewaren, NJ
  • Average humidity in September: 75%

The months with the highest relative humidity are February and May (77%).
The months with the lowest relative humidity are March, April, August and November (73%).

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Average rainfall in September
Sewaren, NJ

Average rainfall in September - Sewaren, NJ
  • Average rainfall in September: 1.81"

The wettest months (with the highest rainfall) are July and December (3.31").
The driest month (with the least rainfall) is September (1.81").

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Average rainfall days in September
Sewaren, NJ

Average rainfall days in September - Sewaren, NJ
  • Average rainfall days in September: 12.8 days

The month with the highest number of rainy days is July (16.2 days).
The month with the least rainy days is January (9.3 days).

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Average snowfall in September
Sewaren, NJ

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

The month with the highest snowfall is March (3.39").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in September
Sewaren, NJ

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

The month with the highest number of snowfall days is January (5.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average sea temperature in September
Sewaren, NJ

Average sea temperature in September - Sewaren, NJ
  • Average sea temperature in September: 70.1°F

The best month for swimming (with the highest average sea temperature) is August (74.1°F).
The coldest month (with the lowest average sea temperature) is February (39.7°F).

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

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

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in September: 8h and 4min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).

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Average sunshine days in September
Sewaren, NJ

Average sunshine days in September - Sewaren, NJ
  • Average sunshine days in September: 15.2 days

The month with the most sunshine days is November (18.2 days).
The month with the least sunshine days is June (12.2 days).

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Average UV index in September
Sewaren, NJ

Average UV index in September - Sewaren, 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, March, November and December (UV index 2).

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Average cloud cover in September
Sewaren, NJ

Average cloud cover in September - Sewaren, NJ
  • Average cloud cover in September: 36

The months with the most cloud cover are February, March and December (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 30).

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Average visibility in September
Sewaren, NJ

Average visibility in September - Sewaren, 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).

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Sewaren, New Jersey, USA

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