September weather forecast and climate
Newark, NJ

A mirrored reflection of Newark City in New Jersey, on the Passaic River
A mirrored reflection of Newark City in New Jersey, on the Passaic River
September, the first month of the autumn, in Newark, is also a moderately hot month, with average temperature varying between 61°F (16.1°C) and 74.8°F (23.8°C).

Temperature

In September, the average high-temperature slightly decreases, from 81.9°F (27.7°C) in August, to a still moderately hot 74.8°F (23.8°C). In September, in Newark, the average low-temperature is 61°F (16.1°C).

Humidity

In Newark, the average relative humidity is 74%.

Rainfall

September is the month with the least rainfall. Rain falls for 12.6 days and accumulates 1.65" (42mm) of precipitation.

Snowfall

In Newark snow does not fall in May through October.

Ocean temperature

In Newark, the average water temperature is 70.2°F (21.2°C).
Note: Swimming in 70.2°F (21.2°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).

Daylight

In September, the average length of the day in Newark, New Jersey, is 12.4h.

Sunshine

The average sunshine in Newark is 9h.

UV index

The average daily maximum UV index in Newark is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 5 in September transform into the following instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.

What is the temperature in September in Newark?

In Newark, in September, the average high-temperature is 74.8°F (23.8°C), and the average low-temperature is 61°F (16.1°C).

What is the average humidity in September in Newark?

The average relative humidity in September in Newark is 74%.

How much does it rain in Newark in September?

In Newark, New Jersey, in September, it is raining for 12.6 days, with typically 1.65" (42mm) of accumulated precipitation.

What is the driest month in Newark?

September is the month with the least rainfall in Newark. Rain falls for 12.6 days and accumulates 1.65" (42mm) of precipitation.

When it does not snow in Newark?

In Newark snow does not fall in May through October.

How cold is the water in September in Newark?

In Newark, New Jersey, the average seawater temperature in September is 70.2°F (21.2°C). For swimming, a surface water temperature of 70.2°F (21.2°C) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 69.8°F (21°C).

How many hours of daylight does Newark have in September?

In September, the average length of the day in Newark is 12.4h.

How many hours of sunshine does Newark have in September?

The average sunshine in September in Newark, New Jersey, is 9h.

How high is the UV index in September in Newark?

In Newark, New Jersey, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from unprotected exposure to the UV radiation.
Average temperature in September - Newark, NJ
  • Average high temperature in September: 74.8°F

The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (36.3°F).

  • Average low temperature in September: 61°F

The month with the highest average low temperature is July (68.9°F).
The coldest month (with the lowest average low temperature) is January (25.7°F).

Average pressure in September - Newark, NJ
  • Average pressure in September: 30.05"

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

Average wind speed in September - Newark, NJ
  • Average wind speed in September: 7mph

The windiest month (with the highest average wind speed) is January (9.8mph).
The calmest month (with the lowest average wind speed) is July (6.3mph).

Average humidity in September - Newark, NJ
  • Average humidity in September: 74%

Months with the highest relative humidity are February, May, October and December (76%).
Months with the lowest relative humidity are April and August (72%).

Average rainfall in September - Newark, NJ
  • Average rainfall in September: 1.65"

The wettest months (with the highest rainfall) are July and December (3.19").
The driest month (with the least rainfall) is September (1.65").

Average rainfall days in September - Newark, NJ
  • Average rainfall days in September: 12.6 days

Months with the highest number of rainy days are May and July (17.1 days).
The month with the least rainy days is November (9.5 days).

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

The month with the highest snowfall is March (3.46").
Months with the least snowfall are May, June, July, August, September and October (0").

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

The month with the highest number of snowfall days is January (6.1 days).
Months with the least snowfall days are May, June, July, August, September and October (0 days).

Average sea temperature in September - Newark, 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).

Average daylight in September / Average sunshine in September - Newark, NJ
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.3h).

  • Average sunshine in September: 9h

The month with the most sunshine is July (Average sunshine: 10.6h).
The month with the least sunshine is February (Average sunshine: 4.8h).

Average sunshine days in September - Newark, NJ
  • Average sunshine days in September: 15.5 days

The month with the most sunshine days is November (18.4 days).
The month with the least sunshine days is June (11.4 days).

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

Months with the highest UV index are June, July and August (UV index 6).
Months with the lowest UV index are January, February, March, November and December (UV index 2).

Average cloud cover in September - Newark, NJ
  • Average cloud cover in September: 35

Months with the most cloud cover are February, March and December (Cloud cover 47).
Months with the least cloud cover are July and August (Cloud cover 30).

Average visibility in September - Newark, NJ
  • Average visibility in September: 6mi

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