September weather forecast
New Brunswick, NJ

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An aerial panorama of the city of Brunswick, New Jersey, seen with its deep tree cover, a large river, and bridges over the river
An aerial panorama of the city of Brunswick, New Jersey, seen with its deep tree cover, a large river, and bridges over the river

Weather in September

The transition from sultry summers to pleasant falls occurs in September in New Brunswick. While days are warm, nights begin to cool off and the humidity gradually recedes, offering soothing rainfall. This makes it a comfortable month, particularly until it gives way to a chillier October. The decline in temperature becomes evident as autumn starts to take control. This transformation becomes noticeable with temperatures ranging between 59.9°F and 75.9°F and a rainfall of 1.61" ensuring a mildly moist transition to autumn.

Temperature

In the transition to September, New Brunswick observes a minor drop in the average high-temperature, shifting from a moderately hot 82.6°F in August to a still warm 75.9°F. In New Brunswick, the expected average low-temperature for September is a mild 59.9°F.

Humidity

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

Rainfall

September is the month with the least rainfall in New Brunswick. Rain falls for 12.6 days and accumulates 1.61" of precipitation.

Snowfall

In New Brunswick, New Jersey, snow does not fall in June through October.

Daylight

In September, the average length of the day in New Brunswick is 12h and 27min.
On the first day of the month, sunrise is at 6:25 am and sunset at 7:30 pm. On the last day of September, in New Brunswick, sunrise is at 6:53 am and sunset at 6:42 pm EDT.

Sunshine

In New Brunswick, the average sunshine in September is 8.5h.

UV index

In September, the average daily maximum UV index in New Brunswick is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: The UV index of 5 in September translates into these instructions:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
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FAQ

What is the average September temperature in New Brunswick?

New Brunswick in September has an average high-temperature of 75.9°F and an average low-temperature of 59.9°F. In August, the average heat index (a.k.a. 'feels like', 'real feel'), which factors the actual air temperature with the relative humidity, is evaluated at 87.8°F.

What is the average humidity in September in New Brunswick?

In September, the average relative humidity in New Brunswick, New Jersey, is 75%.

What is the driest month in New Brunswick?

September is the month with the least rainfall in New Brunswick, New Jersey. Rain falls for 12.6 days and accumulates 1.61" of precipitation.

How much does it rain in New Brunswick in September?

In September, the rain falls for 12.6 days. Throughout September, 1.61" of precipitation is accumulated.

When it does not snow in New Brunswick?

June through October are months without snowfall.

What is the average length of the day in September in New Brunswick?

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

When is the sunrise / sunset in September in New Brunswick?

In September, on the first day of the month, sunrise is at 6:25 am and sunset at 7:30 pm. On the last day of the month, in New Brunswick, New Jersey, sunrise is at 6:53 am and sunset at 6:42 pm EDT.

How many hours of sunshine does New Brunswick have in September?

The average sunshine duration in September in New Brunswick is 8.5h.

What is the UV index reading in September in New Brunswick?

In New Brunswick, New Jersey, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate health threat from unprotected exposure to UV radiation.
Average high temperature
Average low temperature
Average pressure
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
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
New Brunswick, NJ

Average temperature in September - New Brunswick, NJ
  • Average high temperature in September: 75.9°F

The warmest month (with the highest average high temperature) is July (84.6°F).
The month with the lowest average high temperature is January (36.7°F).

  • Average low temperature in September: 59.9°F

The month with the highest average low temperature is July (68.2°F).
The coldest month (with the lowest average low temperature) is January (24.6°F).

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Average pressure in September
New Brunswick, NJ

Average pressure in September - New Brunswick, 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
New Brunswick, NJ

Average wind speed in September - New Brunswick, NJ
  • Average wind speed in September: 6.4mph

The windiest month (with the highest average wind speed) is March (9.1mph).
The calmest months (with the lowest average wind speed) are July and August (5.9mph).

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Average humidity in September
New Brunswick, NJ

Average humidity in September - New Brunswick, NJ
  • Average humidity in September: 75%

The months with the highest relative humidity are February, October and December (77%).
The months with the lowest relative humidity are April and August (72%).

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Average rainfall in September
New Brunswick, NJ

Average rainfall in September - New Brunswick, NJ
  • Average rainfall in September: 1.61"

The wettest month (with the highest rainfall) is July (3.27").
The driest month (with the least rainfall) is September (1.61").

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Average rainfall days in September
New Brunswick, NJ

Average rainfall days in September - New Brunswick, NJ
  • Average rainfall days in September: 12.6 days

The month with the highest number of rainy days is July (16.6 days).
The month with the least rainy days is January (7.9 days).

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Average snowfall in September
New Brunswick, NJ

Average snowfall in September - New Brunswick, NJ
  • Average snowfall in September: 0"

The month with the highest snowfall is March (3.5").
The months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in September
New Brunswick, NJ

Average snowfall days in September - New Brunswick, NJ
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (5.4 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

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Average daylight in September /
Average sunshine in September
New Brunswick, NJ

Average daylight in September / Average sunshine in September - New Brunswick, 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 3min

The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

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Average sunshine days in September
New Brunswick, NJ

Average sunshine days in September - New Brunswick, NJ
  • Average sunshine days in September: 15 days

The month with the most sunshine days is November (19.9 days).
The month with the least sunshine days is July (11.1 days).

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Average UV index in September
New Brunswick, NJ

Average UV index in September - New Brunswick, NJ
  • Average UV index in September: 5

The months with the highest UV index are May, 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
New Brunswick, NJ

Average cloud cover in September - New Brunswick, NJ
  • Average cloud cover in September: 39

The months with the most cloud cover are February, March and December (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 33).

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Average visibility in September
New Brunswick, NJ

Average visibility in September - New Brunswick, NJ
  • Average visibility in September: 6mi

The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).

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New Brunswick, New Jersey, USA

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