September weather forecast and climate
Monroeville, NJ

The first month of the autumn, September, is still a warm month in Monroeville, New Jersey, with temperature in the range of an average high of 76.5°F (24.7°C) and an average low of 61.2°F (16.2°C).

Temperature

In Monroeville, the average high-temperature in September slightly decreases, from a moderately hot 83.3°F (28.5°C) in August, to a still warm 76.5°F (24.7°C). In September, in Monroeville, the average low-temperature is 61.2°F (16.2°C).

Humidity

The average relative humidity is 77%.

Rainfall

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

Snowfall

In Monroeville snow does not fall in June through October.

Daylight

In September, the average length of the day is 12.4h.

Sunshine

In September, the average sunshine in Monroeville is 9.1h.

UV index

In Monroeville, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to the UV radiation for the ordinary person.
Note: The average daily UV index of 5 in September transform into the following instructions:
Take precautions - Protection against sun damage is advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

What is the temperature in September in Monroeville?

In Monroeville, New Jersey, in September, the average high-temperature is 76.5°F (24.7°C), and the average low-temperature is 61.2°F (16.2°C).

What is the average humidity in September in Monroeville?

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

How much does it rain in Monroeville in September?

In September, in Monroeville, the rain falls for 12 days. Throughout September, 1.73" (44mm) of precipitation is accumulated.

What is the driest month in Monroeville?

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

When it does not snow in Monroeville?

In Monroeville snow does not fall in June through October.

How many hours of daylight does Monroeville have in September?

The average length of the day in September in Monroeville, New Jersey, is 12.4h.

How long on average sun shines in September in Monroeville?

In September, the average sunshine in Monroeville is 9.1h.

What is the UV index reading in September in Monroeville?

In Monroeville, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium hazard to health from the exposure to the Sun's UV radiation.
Average temperature in September - Monroeville, NJ
  • Average high temperature in September: 24.7°C

The warmest month (with the highest average high temperature) is July (29.6°C).
The month with the lowest average high temperature is January (3.4°C).

  • Average low temperature in September: 16.2°C

The month with the highest average low temperature is July (20.3°C).
The coldest month (with the lowest average low temperature) is January (-2.9°C).

Average pressure in September - Monroeville, NJ
  • Average pressure in September: 1017.6mbar

The month with the highest atmospheric pressure is November (1020mbar).
The month with the lowest atmospheric pressure is June (1013.8mbar).

Average wind speed in September - Monroeville, NJ
  • Average wind speed in September: 9.9km/h

The windiest month (with the highest average wind speed) is April (14km/h).
The calmest month (with the lowest average wind speed) is August (9.1km/h).

Average humidity in September - Monroeville, 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%).

Average rainfall in September - Monroeville, NJ
  • Average rainfall in September: 44mm

The wettest month (with the highest rainfall) is December (85mm).
The driest month (with the least rainfall) is September (44mm).

Average rainfall days in September - Monroeville, 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).

Average snowfall in September - Monroeville, NJ
  • Average snowfall in September: 0mm

The month with the highest snowfall is March (90mm).
Months with the least snowfall are June, July, August, September and October (0mm).

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

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

Average daylight in September / Average sunshine in September - Monroeville, NJ
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.9h).
The month with the shortest days is December (Average daylight: 9.4h).

  • Average sunshine in September: 9.1h

The month with the most sunshine is July (Average sunshine: 10.8h).
The month with the least sunshine is February (Average sunshine: 4.9h).

Average sunshine days in September - Monroeville, 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).

Average UV index in September - Monroeville, NJ
  • Average UV index in September: 5

Months with the highest UV index are May, June, July and August (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 2).

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

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

Average visibility in September - Monroeville, NJ
  • Average visibility in September: 9km

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).