September weather forecast
Green Island, NJ

Share

Weather in September

September, the first month of the autumn in Green Island, is still a warm month, with an average temperature varying between 64.6°F (18.1°C) and 73.6°F (23.1°C).

Temperature

September's onset introduces a mild reduction in the average high-temperature, from a moderately hot 79.7°F (26.5°C) in August to a still warm 73.6°F (23.1°C). Green Island experiences a minimal drop from daytime high temperatures, recording an average low-temperature of 64.6°F (18.1°C) throughout September.

Humidity

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

Rainfall

In September, in Green Island, the rain falls for 12.3 days. Throughout September, 1.46" (37mm) of precipitation is accumulated. In Green Island, during the entire year, the rain falls for 137.7 days and collects up to 19.09" (485mm) of precipitation.

Snowfall

April through October are months without snowfall.

Daylight

The average length of the day in September in Green Island is 12h and 26min.
On the first day of September, sunrise is at 6:24 am and sunset at 7:27 pm. On the last day of the month, sunrise is at 6:52 am and sunset at 6:39 pm EDT.

Sunshine

In Green Island, the average sunshine in September is 9h.

UV index

The average daily maximum UV index in September in Green Island, New Jersey, is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for ordinary individuals.
Note: In September, the UV index of 5 transforms into the following advice:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
[Resources]

Frequently asked questions

What is the temperature in September in Green Island?

The high-temperature, in September, in Green Island, records 73.6°F (23.1°C), while the low-temperature is 64.6°F (18.1°C). In July, the average heat index (a.k.a. 'apparent temperature', 'real feel'), which takes the relative humidity and factors it into the air temperature reading, is estimated at 86°F (30°C).

What is the average humidity in September in Green Island?

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

How much does it rain in Green Island in September?

In September, the rain falls for 12.3 days. Throughout September, 1.46" (37mm) of precipitation is accumulated.

When it does not snow in Green Island?

In Green Island, New Jersey, snow does not fall in April through October.

What is the average length of the day in September in Green Island?

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

When is the sunrise / sunset in September in Green Island?

On the first day of September in Green Island, sunrise is at 6:24 am and sunset at 7:27 pm. On the last day of the month, sunrise is at 6:52 am and sunset at 6:39 pm EDT.

How many hours of sunshine does Green Island have in September?

In Green Island, the average sunshine duration in September is 9h.

How high is the UV index in September in Green Island?

The average daily maximum UV index in September in Green Island is 5. A UV Index reading of 3 to 5 represents a moderate vulnerability from 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
Green Island, NJ

Average temperature in September - Green Island, NJ
  • Average high temperature in September: 73.6°F

The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (38.8°F).

  • Average low temperature in September: 64.6°F

The month with the highest average low temperature is July (70.9°F).
The coldest month (with the lowest average low temperature) is January (29.1°F).

[Resources]

Average pressure in September
Green Island, NJ

Average pressure in September - Green Island, 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).

[Resources]

Average wind speed in September
Green Island, NJ

Average wind speed in September - Green Island, NJ
  • Average wind speed in September: 9.3mph

The windiest month (with the highest average wind speed) is January (12.2mph).
The calmest month (with the lowest average wind speed) is July (8mph).

[Resources]

Average humidity in September
Green Island, NJ

Average humidity in September - Green Island, NJ
  • Average humidity in September: 77%

The months with the highest relative humidity are May and June (80%).
The months with the lowest relative humidity are January, March and November (74%).

[Resources]

Average rainfall in September
Green Island, NJ

Average rainfall in September - Green Island, NJ
  • Average rainfall in September: 1.46"

The wettest month (with the highest rainfall) is July (2.56").
The driest month (with the least rainfall) is January (0.94").

[Resources]

Average rainfall days in September
Green Island, NJ

Average rainfall days in September - Green Island, NJ
  • Average rainfall days in September: 12.3 days

The month with the highest number of rainy days is July (16.1 days).
The month with the least rainy days is January (7 days).

[Resources]

Average snowfall in September
Green Island, NJ

Average snowfall in September - Green Island, NJ
  • Average snowfall in September: 0"

The month with the highest snowfall is January (0.91").
The months with the least snowfall are April, May, June, July, August, September and October (0").

[Resources]

Average snowfall days in September
Green Island, NJ

Average snowfall days in September - Green Island, NJ
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (4.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

[Resources]

Average daylight in September /
Average sunshine in September
Green Island, NJ

Average daylight in September / Average sunshine in September - Green Island, 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 24min).

  • Average sunshine in September: 9h and 0min

The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).

[Resources]

Average sunshine days in September
Green Island, NJ

Average sunshine days in September - Green Island, NJ
  • Average sunshine days in September: 15.6 days

The month with the most sunshine days is January (20.2 days).
The month with the least sunshine days is July (11.9 days).

[Resources]

Average UV index in September
Green Island, NJ

Average UV index in September - Green Island, 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, November and December (UV index 2).

[Resources]

Average cloud cover in September
Green Island, NJ

Average cloud cover in September - Green Island, NJ
  • Average cloud cover in September: 33

The month with the most cloud cover is February (Cloud cover 47).
The months with the least cloud cover are July and August (Cloud cover 28).

[Resources]

Average visibility in September
Green Island, NJ

Average visibility in September - Green Island, 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).

[Resources]

Green Island, New Jersey, USA

Weather forecast for your location

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