September weather forecast
Edison, NJ

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Weather in September

September marks the onset of the fall season. The weather starts cooling off from the summer heat as temperatures slightly drop. The temperature reduction is evident in a decrease from 75.6 in August to a lower level in September. September furnishes an inviting climate with a balance of warmth and chilliness. As leaves start changing their color, the city nature pronounces its beauty.

Temperature

Edison experiences a moderate temperature shift at the start of September, with average high-temperatures adjusting a bit from 82.6°F (28.1°C) in August to a still moderately hot 75.6°F (24.2°C). Edison records an average low of 60.4°F (15.8°C) throughout the nights in September.

Humidity

The average relative humidity in September is 75%.

Rainfall

September is the month with the least rainfall in Edison. Rain falls for 12.8 days and accumulates 1.54" (39mm) of precipitation.

Snowfall

In Edison, snow does not fall in May through October.

Daylight

In September, the average length of the day is 12h and 27min.
On the first day of the month, sunrise is at 6:25 am and sunset at 7:29 pm. On the last day of September, in Edison, sunrise is at 6:53 am and sunset at 6:40 pm EDT.

Sunshine

In September, the average sunshine is 8.6h.

UV index

In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: In September, the maximum UV index of 5 translates into these guidelines:
Heed the precautions - It is counselled to guard against solar damage. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
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Frequently asked questions

What is the temperature in September in Edison?

In Edison, 75.6°F (24.2°C) is the average high-temperature and 60.4°F (15.8°C) is the average low-temperature during September. The average heat index (a.k.a. 'real feel', 'felt air temperature'), which takes the relative humidity and factors it into the air temperature reading, in August is evaluated at 87.8°F (31°C).

What is the average humidity in September in Edison?

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

What is the driest month in Edison?

The month with the least rainfall in Edison, New Jersey, is September, when the rain falls for 12.8 days and typically collects 1.54" (39mm) of precipitation.

How many days does it rain in September in Edison?

In Edison, New Jersey, during September, the rain falls for 12.8 days and regularly aggregates up to 1.54" (39mm) of precipitation.

When it does not snow in Edison?

May through October are months without snowfall in Edison, New Jersey.

How many hours of daylight does Edison have in September?

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

What time are sunrise and sunset in September in Edison?

On the first day of September in Edison, New Jersey, sunrise is at 6:25 am and sunset at 7:29 pm. On the last day of the month, sunrise is at 6:53 am and sunset at 6:40 pm EDT.

How many hours of sunshine does Edison have in September?

In Edison, the average sunshine duration in September is 8.6h.

How high is the UV index in September in Edison?

In September, the average daily maximum UV index in Edison is 5. A UV Index estimate of 3 to 5 represents a moderate health threat from exposure to the Sun's UV radiation.
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
Edison, NJ

Average temperature in September - Edison, NJ
  • Average high temperature in September: 75.6°F

The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is January (36.7°F).

  • Average low temperature in September: 60.4°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 (25°F).

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Average pressure in September
Edison, NJ

Average pressure in September - Edison, 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
Edison, NJ

Average wind speed in September - Edison, NJ
  • Average wind speed in September: 6.5mph

The windiest month (with the highest average wind speed) is March (9.3mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).

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Average humidity in September
Edison, NJ

Average humidity in September - Edison, NJ
  • Average humidity in September: 75%

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

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Average rainfall in September
Edison, NJ

Average rainfall in September - Edison, NJ
  • Average rainfall in September: 1.54"

The wettest month (with the highest rainfall) is July (3.07").
The driest month (with the least rainfall) is September (1.54").

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Average rainfall days in September
Edison, NJ

Average rainfall days in September - Edison, NJ
  • Average rainfall days in September: 12.8 days

The month with the highest number of rainy days is July (16.8 days).
The month with the least rainy days is January (8.3 days).

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Average snowfall in September
Edison, NJ

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

The month with the highest snowfall is March (3.27").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in September
Edison, NJ

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

The month with the highest number of snowfall days is January (5.6 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight in September /
Average sunshine in September
Edison, NJ

Average daylight in September / Average sunshine in September - Edison, 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 4min

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
Edison, NJ

Average sunshine days in September - Edison, NJ
  • Average sunshine days in September: 14.7 days

The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is July (11.3 days).

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Average UV index in September
Edison, NJ

Average UV index in September - Edison, 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
Edison, NJ

Average cloud cover in September - Edison, NJ
  • Average cloud cover in September: 38

The months with the most cloud cover are February and December (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 32).

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Average visibility in September
Edison, NJ

Average visibility in September - Edison, 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).

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Edison, New Jersey, USA

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