September weather forecast
Glassboro, NJ

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Weather in September

September, the first month of the autumn in Glassboro, is still a warm month, with an average temperature varying between 61.2°F (16.2°C) and 76.5°F (24.7°C).

Temperature

Glassboro's weather in September involves a mild decrease in the average high-temperature, moving down slightly from August's moderately hot 83.3°F (28.5°C) to a still warm 76.5°F (24.7°C). In September, Glassboro's temperature tends to fall to an average low of 61.2°F (16.2°C) during the night.

Humidity

In September, the average relative humidity is 77%.

Rainfall

September is the month with the least rainfall. Rain falls for 12 days and accumulates 1.73" (44mm) of precipitation.

Snowfall

In Glassboro, snow does not fall in June through October.

Daylight

In September, the average length of the day is 12h and 26min.
On the first day of September, sunrise is at 6:29 am and sunset at 7:31 pm. On the last day of the month, sunrise is at 6:56 am and sunset at 6:44 pm EDT.

Sunshine

The average sunshine in September in Glassboro is 9.1h.

UV index

In September, the average daily maximum UV index in Glassboro is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: A typical high UV index of 5 in September suggests the following recommendations:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
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Frequently asked questions

What is the usual temperature for Glassboro in September?

An average high-temperature, in September, in Glassboro, is 76.5°F (24.7°C) and the average low-temperature is 61.2°F (16.2°C). The average heat index (a.k.a. 'feels like', 'felt air temperature'), which combines relative humidity and air temperature, in August is evaluated at 89.6°F (32°C).

What is the average humidity in September in Glassboro?

The average relative humidity in September is 77%.

What is the driest month in Glassboro?

The month with the least rainfall in Glassboro is September, when the rain falls for 12 days and typically collects 1.73" (44mm) of precipitation.

How much does it rain in Glassboro in September?

In Glassboro, in September, it is raining for 12 days, with typically 1.73" (44mm) of accumulated precipitation.

When it does not snow in Glassboro?

In Glassboro, New Jersey, snow does not fall in June through October.

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

In September, the average day length in Glassboro, New Jersey, is 12h and 26min.

What time are sunrise and sunset in September in Glassboro?

On the first day of September in Glassboro, sunrise is at 6:29 am and sunset at 7:31 pm. On the last day of the month, sunrise is at 6:56 am and sunset at 6:44 pm EDT.

How many hours of sunshine does Glassboro have in September?

The average sunshine duration in September is 9.1h.

How high is the UV index in September in Glassboro?

The average daily maximum UV index in September in Glassboro, New Jersey, is 5. A UV Index estimate of 3 to 5 represents a moderate vulnerability 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
Glassboro, NJ

Average temperature in September - Glassboro, NJ
  • Average high temperature in September: 76.5°F

The warmest month (with the highest average high temperature) is July (85.3°F).
The month with the lowest average high temperature is January (38.1°F).

  • Average low temperature in September: 61.2°F

The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (26.8°F).

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Average pressure in September
Glassboro, NJ

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

The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

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Average wind speed in September
Glassboro, NJ

Average wind speed in September - Glassboro, NJ
  • Average wind speed in September: 6.2mph

The windiest month (with the highest average wind speed) is April (8.7mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).

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Average humidity in September
Glassboro, NJ

Average humidity in September - Glassboro, NJ
  • Average humidity in September: 77%

The month with the highest relative humidity is October (78%).
The month with the lowest relative humidity is April (71%).

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Average rainfall in September
Glassboro, NJ

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

The wettest month (with the highest rainfall) is December (3.35").
The driest month (with the least rainfall) is September (1.73").

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Average rainfall days in September
Glassboro, NJ

Average rainfall days in September - Glassboro, NJ
  • Average rainfall days in September: 12 days

The month with the highest number of rainy days is July (16.9 days).
The month with the least rainy days is January (8.8 days).

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Average snowfall in September
Glassboro, NJ

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

The month with the highest snowfall is March (3.54").
The months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in September
Glassboro, NJ

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

The month with the highest number of snowfall days is January (5.5 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

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

Average daylight in September / Average sunshine in September - Glassboro, NJ
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in September: 9h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).

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Average sunshine days in September
Glassboro, NJ

Average sunshine days in September - Glassboro, NJ
  • Average sunshine days in September: 16.3 days

The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is July (11.8 days).

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Average UV index in September
Glassboro, NJ

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

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Average cloud cover in September
Glassboro, NJ

Average cloud cover in September - Glassboro, NJ
  • Average cloud cover in September: 35

The months with the most cloud cover are February and March (Cloud cover 46).
The months with the least cloud cover are July and August (Cloud cover 30).

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Average visibility in September
Glassboro, NJ

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

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