September weather forecast and climate
Island Heights, NJ

Weather in September

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

Temperature

In September, the average high-temperature marginally drops, from 79.9°F (26.6°C) in August, to a still moderately hot 73.8°F (23.2°C). In September, the average low-temperature is 64.4°F (18°C).

Humidity

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

Rainfall

In Island Heights, during September, the rain falls for 11.7 days and regularly aggregates up to 1.14" (29mm) of precipitation. Throughout the year, in Island Heights, there are 129.4 rainfall days, and 15.31" (389mm) of precipitation is accumulated.

Snowfall

April through October are months without snowfall in Island Heights.

Daylight

In Island Heights, the average length of the day is 12.4h.

Sunshine

The average sunshine in Island Heights is 9h.

UV index

In September, the average daily maximum UV index in Island Heights, New Jersey, is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to the UV radiation for average individuals.
Note: In September, the average maximum UV index of 5 translate into the following recommendations:
Take precautions - Protection against the skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in September in Island Heights?

The average high-temperature, in September, is 73.8°F (23.2°C), while the average low-temperature is 64.4°F (18°C).

What is the average humidity in September in Island Heights?

The average relative humidity in September in Island Heights, New Jersey, is 77%.

How many days does it rain in September in Island Heights?

In Island Heights, in September, it is raining for 11.7 days, with typically 1.14" (29mm) of accumulated precipitation.

When it does not snow in Island Heights?

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 length of the day in September in Island Heights is 12.4h.

How long on average sun shines in September in Island Heights?

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

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

In Island Heights, New Jersey, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium hazard to health from unprotected exposure to the UV radiation.

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).

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Average pressure in September
Island Heights, NJ

Average pressure in September - Island Heights, 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").

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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).

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Average humidity in September
Island Heights, NJ

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

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

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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").

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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).

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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").
Months with the least snowfall are April, May, June, July, August, September and October (0").

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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).
Months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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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: 12.4h

The month with the longest days is June (Average daylight: 15h).
The month with the shortest days is December (Average daylight: 9.4h).

  • Average sunshine in September: 9h

The month with the most sunshine is July (Average sunshine: 10.7h).
The month with the least sunshine is February (Average sunshine: 4.9h).

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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).

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Average UV index in September
Island Heights, NJ

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

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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).
Months with the least cloud cover are July and August (Cloud cover 28).

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Average visibility in September
Island Heights, NJ

Average visibility in September - Island Heights, 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).

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