September weather forecast
Belle Vernon, PA

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Weather in September

September, the first month of the autumn in Belle Vernon, is also a moderately hot month, with an average temperature varying between 75.4°F (24.1°C) and 55°F (12.8°C).

Temperature

September implies a soft temperature shift, with average high-temperatures reducing from August's 81.9°F (27.7°C) to a still moderately hot 75.4°F (24.1°C). Belle Vernon experiences a mean temperature of 55°F (12.8°C) during September nights.

Humidity

In September, the average relative humidity is 78%.

Rainfall

In Belle Vernon, during September, the rain falls for 14.3 days and regularly aggregates up to 2.4" (61mm) of precipitation. Throughout the year, in Belle Vernon, Pennsylvania, there are 191.3 rainfall days, and 35.24" (895mm) of precipitation is accumulated.

Snowfall

June through September are months without snowfall in Belle Vernon.

Daylight

In Belle Vernon, the average length of the day in September is 12h and 26min.
On the first day of the month, sunrise is at 6:47 am and sunset at 7:50 pm. On the last day of September, sunrise is at 7:15 am and sunset at 7:02 pm EDT.

Sunshine

In Belle Vernon, the average sunshine in September is 8.7h.

UV index

In September, the average daily maximum UV index in Belle Vernon is 4. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the average person.
Note: In September, a daily UV index of 4 turns into the following recommendations:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
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Frequently asked questions

What are the temperatures in Belle Vernon in September?

In September, the average high-temperature and low-temperature in Belle Vernon, Pennsylvania, are 75.4°F (24.1°C) and 55°F (12.8°C) respectively. The average heat index (a.k.a. 'real feel', 'feels like'), which combines relative humidity and air temperature, in August is computed to be 87.8°F (31°C).

What is the average humidity in September in Belle Vernon?

The average relative humidity in September in Belle Vernon is 78%.

How much does it rain in Belle Vernon in September?

In Belle Vernon, Pennsylvania, in September, during 14.3 rainfall days, 2.4" (61mm) of precipitation is typically accumulated.

When it does not snow in Belle Vernon?

June through September are months without snowfall in Belle Vernon.

Does it snow in Belle Vernon in September?

In Belle Vernon, in September, it doesn't snow. In October, it regularly snows.

What is the average length of the day in September in Belle Vernon?

In September, the average day length in Belle Vernon is 12h and 26min.

When is the sunrise / sunset in September in Belle Vernon?

On the first day of September in Belle Vernon, sunrise is at 6:47 am and sunset at 7:50 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 7:02 pm EDT.

How long on average sun shines in September in Belle Vernon?

The average sunshine duration in September in Belle Vernon, Pennsylvania, is 8.7h.

What is the UV index reading in September in Belle Vernon?

The average daily maximum UV index in September in Belle Vernon, Pennsylvania, is 4. A UV Index of 3 to 5 symbolizes a medium health risk from unprotected exposure to 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
Belle Vernon, PA

Average temperature in September - Belle Vernon, PA
  • Average high temperature in September: 75.4°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 (34°F).

  • Average low temperature in September: 55°F

The month with the highest average low temperature is July (61.5°F).
The coldest month (with the lowest average low temperature) is January (21.2°F).

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Average pressure in September
Belle Vernon, PA

Average pressure in September - Belle Vernon, PA
  • Average pressure in September: 30.05"Hg

The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).

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Average wind speed in September
Belle Vernon, PA

Average wind speed in September - Belle Vernon, PA
  • Average wind speed in September: 5mph

The windiest month (with the highest average wind speed) is January (7.9mph).
The calmest month (with the lowest average wind speed) is August (4.6mph).

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Average humidity in September
Belle Vernon, PA

Average humidity in September - Belle Vernon, PA
  • Average humidity in September: 78%

The months with the highest relative humidity are January and February (84%).
The month with the lowest relative humidity is August (76%).

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Average rainfall in September
Belle Vernon, PA

Average rainfall in September - Belle Vernon, PA
  • Average rainfall in September: 2.4"

The wettest month (with the highest rainfall) is May (3.78").
The driest month (with the least rainfall) is November (2.13").

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Average rainfall days in September
Belle Vernon, PA

Average rainfall days in September - Belle Vernon, PA
  • Average rainfall days in September: 14.3 days

The month with the highest number of rainy days is May (21.8 days).
The months with the least rainy days are January and February (11.7 days).

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Average snowfall in September
Belle Vernon, PA

Average snowfall in September - Belle Vernon, PA
  • Average snowfall in September: 0"

The month with the highest snowfall is January (6.26").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Belle Vernon, PA

Average snowfall days in September - Belle Vernon, PA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (17.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in September /
Average sunshine in September
Belle Vernon, PA

Average daylight in September / Average sunshine in September - Belle Vernon, PA
  • 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 24min).

  • Average sunshine in September: 8h and 4min

The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).

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Average sunshine days in September
Belle Vernon, PA

Average sunshine days in September - Belle Vernon, PA
  • Average sunshine days in September: 13.7 days

The month with the most sunshine days is November (14.3 days).
The month with the least sunshine days is January (6.8 days).

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Average UV index in September
Belle Vernon, PA

Average UV index in September - Belle Vernon, PA
  • Average UV index in September: 4

The months with the highest UV index are May, June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).

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Average cloud cover in September
Belle Vernon, PA

Average cloud cover in September - Belle Vernon, PA
  • Average cloud cover in September: 37

The month with the most cloud cover is January (Cloud cover 68).
The month with the least cloud cover is August (Cloud cover 33).

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Average visibility in September
Belle Vernon, PA

Average visibility in September - Belle Vernon, PA
  • Average visibility in September: 5mi

The months with the highest visibility are April, August and November (6mi).
The months with the lowest visibility are January and February (4mi).

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Belle Vernon, Pennsylvania, USA

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