September weather forecast
Harrison, NJ

Weather in September

September, the first month of the autumn in Harrison, is still a warm month, with an average temperature ranging between max 74.5°F (23.6°C) and min 61.7°F (16.5°C).

Temperature

In Harrison, the average high-temperature in September marginally drops from a warm 81.3°F (27.4°C) in August to a still moderately hot 74.5°F (23.6°C). The average low-temperature, in September, is 61.7°F (16.5°C).

Humidity

The average relative humidity in September is 73%.

Rainfall

In Harrison, New Jersey, during September, the rain falls for 12.9 days and regularly aggregates up to 1.85" (47mm) of precipitation. In Harrison, during the entire year, the rain falls for 150.3 days and collects up to 27.72" (704mm) of precipitation.

Snowfall

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

Daylight

The average length of the day in September in Harrison is 12h and 27min.
On the first day of September, sunrise is at 6:23 am and sunset at 7:29 pm. On the last day of the month, sunrise is at 6:52 am and sunset at 6:41 pm EDT.

Sunshine

In Harrison, the average sunshine in September is 8.9h.

UV index

The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 5 in September interpret into the following advice:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in September in Harrison?

In September, in Harrison, the average high-temperature is 74.5°F (23.6°C), and the average low-temperature is 61.7°F (16.5°C). in August, the average heat index (a.k.a. 'real feel', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, is computed to be 86°F (30°C).

What is the average humidity in September in Harrison?

The average relative humidity in September in Harrison is 73%.

How much does it rain in Harrison in September?

In Harrison, New Jersey, in September, it is raining for 12.9 days, with typically 1.85" (47mm) of accumulated precipitation.

When it does not snow in Harrison?

In Harrison, New Jersey, snow does not fall in May through October.

How many hours of daylight does Harrison have in September?

The average day length in September is 12h and 27min.

When is the sunrise / sunset in September in Harrison?

In September, on the first day of the month, sunrise is at 6:23 am and sunset at 7:29 pm. On the last day of the month, in Harrison, sunrise is at 6:52 am and sunset at 6:41 pm EDT.

How many hours of sunshine does Harrison have in September?

In Harrison, the average sunshine duration in September is 8.9h.

What is the UV index intensity in September in Harrison?

The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate vulnerability from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Harrison, NJ

Average temperature in September - Harrison, NJ
  • Average high temperature in September: 74.5°F

The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (36.3°F).

  • Average low temperature in September: 61.7°F

The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is January (25.9°F).

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Average pressure in September
Harrison, NJ

Average pressure in September - Harrison, NJ
  • Average pressure in September: 30.05"Hg

The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in September
Harrison, NJ

Average wind speed in September - Harrison, NJ
  • Average wind speed in September: 7.3mph

The windiest month (with the highest average wind speed) is January (9.9mph).
The calmest month (with the lowest average wind speed) is July (6.5mph).

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Average humidity in September
Harrison, NJ

Average humidity in September - Harrison, NJ
  • Average humidity in September: 73%

The months with the highest relative humidity are February and December (75%).
The month with the lowest relative humidity is August (70%).

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Average rainfall in September
Harrison, NJ

Average rainfall in September - Harrison, NJ
  • Average rainfall in September: 1.85"

The wettest month (with the highest rainfall) is July (3.23").
The driest months (with the least rainfall) are January and February (1.69").

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Average rainfall days in September
Harrison, NJ

Average rainfall days in September - Harrison, NJ
  • Average rainfall days in September: 12.9 days

The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is January (7.3 days).

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Average snowfall in September
Harrison, NJ

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

The month with the highest snowfall is March (2.8").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in September
Harrison, NJ

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

The months with the highest number of snowfall days are January and February (5.3 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
Harrison, NJ

Average daylight in September / Average sunshine in September - Harrison, NJ
  • Average daylight in September: 12h and 27min

The month with the longest days is June (Average daylight: 15h and 3min).
The month with the shortest days is December (Average daylight: 9h and 19min).

  • Average sunshine in September: 8h and 54min

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 48min).

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Average sunshine days in September
Harrison, NJ

Average sunshine days in September - Harrison, NJ
  • Average sunshine days in September: 15.2 days

The month with the most sunshine days is January (19.6 days).
The month with the least sunshine days is July (12 days).

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Average UV index in September
Harrison, NJ

Average UV index in September - Harrison, 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, March, November and December (UV index 2).

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Average cloud cover in September
Harrison, NJ

Average cloud cover in September - Harrison, NJ
  • Average cloud cover in September: 34

The months with the most cloud cover are February, March and December (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 29).

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Average visibility in September
Harrison, NJ

Average visibility in September - Harrison, 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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