September weather forecast
Dumont, NJ

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Weather in September

September, the first month of the autumn in Dumont, is also a moderately hot month, with an average temperature fluctuating between 59.9°F (15.5°C) and 75.4°F (24.1°C).

Temperature

The shift from August to September includes a small decrease in the average high-temperature, from a moderately hot 82.9°F (28.3°C) to a still warm 75.4°F (24.1°C). Dumont's nighttime temperature during September is consistently averaged at a refreshing 59.9°F (15.5°C).

Humidity

In Dumont, the average relative humidity in September is 73%.

Rainfall

The month with the least rainfall in Dumont is September, when the rain falls for 11.6 days and typically collects 1.73" (44mm) of precipitation.

Snowfall

In Dumont, 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 6:23 am and sunset at 7:28 pm. On the last day of September, in Dumont, sunrise is at 6:52 am and sunset at 6:39 pm EDT.

Sunshine

The average sunshine in September is 8.6h.

UV index

In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: A maximum high UV index of 4 in September translates into the following recommendations:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Experience reduced UV exposure by about half when donning a wide-brim hat.
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Frequently asked questions

What is the average September temperature in Dumont?

The high-temperature, in September, in Dumont, is 75.4°F (24.1°C), while the low-temperature averages to 59.9°F (15.5°C). The average heat index (a.k.a. 'feels like', 'apparent temperature'), which factors the actual air temperature with the relative humidity, in August is evaluated at 87.8°F (31°C).

What is the average humidity in September in Dumont?

In September, the average relative humidity is 73%.

What is the driest month in Dumont?

September is the month with the least rainfall in Dumont, New Jersey. Rain falls for 11.6 days and accumulates 1.73" (44mm) of precipitation.

How many days does it rain in September in Dumont?

In Dumont, in September, during 11.6 rainfall days, 1.73" (44mm) of precipitation is typically accumulated.

When it does not snow in Dumont?

May through October are months without snowfall in Dumont.

What is the average length of the day in September in Dumont?

In September, the average day length in Dumont, New Jersey, is 12h and 27min.

When are sunrise and sunset in September in Dumont?

On the first day of September in Dumont, sunrise is at 6:23 am and sunset at 7:28 pm. On the last day of the month, sunrise is at 6:52 am and sunset at 6:39 pm EDT.

How long on average sun shines in September in Dumont?

The average sunshine duration in September is 8.6h.

What is the UV index reading in September in Dumont?

In Dumont, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium health risk from unsafe 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
Dumont, NJ

Average temperature in September - Dumont, NJ
  • Average high temperature in September: 75.4°F

The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is January (35.4°F).

  • Average low temperature in September: 59.9°F

The month with the highest average low temperature is July (68°F).
The coldest month (with the lowest average low temperature) is January (24.1°F).

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Average pressure in September
Dumont, NJ

Average pressure in September - Dumont, NJ
  • Average pressure in September: 30.06"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
Dumont, NJ

Average wind speed in September - Dumont, NJ
  • Average wind speed in September: 6.3mph

The windiest months (with the highest average wind speed) are January and March (8.5mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).

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Average humidity in September
Dumont, NJ

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

The month with the highest relative humidity is February (77%).
The month with the lowest relative humidity is August (68%).

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Average rainfall in September
Dumont, NJ

Average rainfall in September - Dumont, NJ
  • Average rainfall in September: 1.73"

The wettest month (with the highest rainfall) is December (3.46").
The driest month (with the least rainfall) is September (1.73").

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Average rainfall days in September
Dumont, NJ

Average rainfall days in September - Dumont, NJ
  • Average rainfall days in September: 11.6 days

The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is January (8.2 days).

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Average snowfall in September
Dumont, NJ

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

The month with the highest snowfall is March (3.07").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in September
Dumont, NJ

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

The month with the highest number of snowfall days is January (6.9 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
Dumont, NJ

Average daylight in September / Average sunshine in September - Dumont, NJ
  • Average daylight in September: 12h and 3min

The month with the longest days is June (Average daylight: 15h and 6min).
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 18min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

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Average sunshine days in September
Dumont, NJ

Average sunshine days in September - Dumont, NJ
  • Average sunshine days in September: 16.7 days

The months with the most sunshine days are January and November (18.1 days).
The months with the least sunshine days are April and June (12.7 days).

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Average UV index in September
Dumont, NJ

Average UV index in September - Dumont, NJ
  • Average UV index in September: 4

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
Dumont, NJ

Average cloud cover in September - Dumont, NJ
  • Average cloud cover in September: 37

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

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Average visibility in September
Dumont, NJ

Average visibility in September - Dumont, 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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Dumont, New Jersey, USA

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