September weather forecast
Island Heights, NJ

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Weather in September

The first month of the autumn, September, is still a warm month in Island Heights, New Jersey, with an average temperature fluctuating between 73.8°F (23.2°C) and 64.4°F (18°C).

Temperature

September's onset corresponds with a subtle shift in the average high-temperature, slightly moving from 79.9°F (26.6°C) in August to a still moderately hot 73.8°F (23.2°C). An average low-temperature of 64.4°F (18°C) marks the month of September.

Humidity

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

Rainfall

In Island Heights, in September, during 11.7 rainfall days, 1.14" (29mm) of precipitation is typically accumulated. Throughout the year, there are 129.4 rainfall days, and 15.31" (389mm) of precipitation is accumulated.

Snowfall

April through October are months without snowfall.

Daylight

The average length of the day in September is 12h and 26min.
On the first day of September, sunrise is at 6:25 am and sunset at 7:27 pm. On the last day of the month, sunrise is at 6:52 am and sunset at 6:40 pm EDT.

Sunshine

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

UV index

In September, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: A maximum high daily UV index of 5 during September translates into the following directions:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Updated: Aug 17, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average September temperature in Island Heights?

Island Heights in September has an average high-temperature of 73.8°F (23.2°C) and an average low-temperature of 64.4°F (18°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which factors the actual air temperature with the relative humidity, in July is calculated to be 86°F (30°C).

What is the average humidity in September?

In September, the average relative humidity is 77%.

How many days does it rain in September?

In September, the rain falls for 11.7 days. Throughout September, 1.14" (29mm) of precipitation is accumulated.

When it does not snow?

In Island Heights, snow does not fall in April through October.

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

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

When are sunrise and sunset in September?

On the first day of September, sunrise is at 6:25 am and sunset at 7:27 pm. On the last day of the month, sunrise is at 6:52 am and sunset at 6:40 pm EDT.

How long on average sun shines in September?

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

What is the UV index reading in September?

In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a medium hazard to health 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
Island Heights, NJ

Average temperature in September - Island Heights, NJ
  • Average high temperature in September: 73.8°F

The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (38.7°F).

  • Average low temperature in September: 64.4°F

The month with the highest average low temperature is July (70.7°F).
The coldest month (with the lowest average low temperature) is January (28.8°F).

Average pressure in September
Island Heights, NJ

Average pressure in September - Island Heights, 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).

Average wind speed in September
Island Heights, NJ

Average wind speed in September - Island Heights, NJ
  • Average wind speed in September: 9mph

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 (7.8mph).

Average humidity in September
Island Heights, NJ

Average humidity in September - Island Heights, 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%).

Average rainfall in September
Island Heights, NJ

Average rainfall in September - Island Heights, NJ
  • Average rainfall in September: 1.14"

The wettest month (with the highest rainfall) is July (1.97").
The driest month (with the least rainfall) is January (0.79").

Average rainfall days in September
Island Heights, NJ

Average rainfall days in September - Island Heights, NJ
  • Average rainfall days in September: 11.7 days

The month with the highest number of rainy days is July (14.3 days).
The month with the least rainy days is January (6.9 days).

Average snowfall in September
Island Heights, NJ

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

The month with the highest snowfall is December (0.75").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in September
Island Heights, NJ

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

The month with the highest number of snowfall days is January (4.3 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
Island Heights, NJ

Average daylight in September / Average sunshine in September - Island Heights, 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).

Average sunshine days in September
Island Heights, NJ

Average sunshine days in September - Island Heights, NJ
  • Average sunshine days in September: 16.1 days

The month with the most sunshine days is November (20.6 days).
The month with the least sunshine days is July (13.9 days).

Average UV index in September
Island Heights, NJ

Average UV index in September - Island Heights, 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).

Average cloud cover in September
Island Heights, NJ

Average cloud cover in September - Island Heights, 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).

Average visibility in September
Island Heights, NJ

Average visibility in September - Island Heights, 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).

Island Heights, New Jersey, USA

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