September weather forecast
Wilkes-Barre, PA

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The cityscape of the scenic Wilkes - Barre, Pennsylvania
The cityscape of the scenic Wilkes - Barre, Pennsylvania

Weather in September

In September, Wilkes-Barre starts witnessing early signs of autumn, with temperatures dropping to an average high of 71.4°F (21.9°C). The noteworthy decrease in rainfall to 0.71" (18mm), the lowest of the year, marks a shift in weather patterns. The daylight hours continue to decrease, however, the city remains illuminated for more than 12 hours a day, aiding in outdoor activities. With changing weather, the city also sees a transformation in its color palette, with leaves turning to shades of yellow, orange and red. The approach of fall through September is a delightful spectacle, with the swift weather changes reflecting the beauty of changing seasons.

Temperature

September's arrival signals a moderate reduction in the average high-temperature, easing from a warm 78.3°F (25.7°C) in August to a pleasant 71.4°F (21.9°C). Wilkes-Barre, in September, observes a steady average low-temperature of 51.6°F (10.9°C).

Humidity

In Wilkes-Barre, the average relative humidity in September is 80%.

Rainfall

September is the month with the least rainfall. Rain falls for 9.9 days and accumulates 0.71" (18mm) of precipitation.

Snowfall

In Wilkes-Barre, snow does not fall in June through September.

Daylight

In September, the average length of the day is 12h and 28min.
On the first day of the month, sunrise is at 6:30 am and sunset at 7:35 pm. On the last day of September, sunrise is at 6:59 am and sunset at 6:46 pm EDT.

Sunshine

In Wilkes-Barre, the average sunshine in September is 8.6h.

UV index

In Wilkes-Barre, the average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the average person.
Note: The maximum daily UV index of 3 in September converts into the following recommendations:
Exercise prevention - Warding off sunburn is urged. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. 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.
Updated: Jul 22, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are September temperatures?

In September, the average high-temperature and low-temperature are 71.4°F (21.9°C) and 51.6°F (10.9°C) respectively. The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, in July is estimated at 86°F (30°C).

What is the average humidity in September?

In September, the average relative humidity is 80%.

What is the driest month?

September is the month with the least rainfall. Rain falls for 9.9 days and accumulates 0.71" (18mm) of precipitation.

How much does it rain in September?

In Wilkes-Barre, during September, the rain falls for 9.9 days and regularly aggregates up to 0.71" (18mm) of precipitation.

When it does not snow?

In Wilkes-Barre, snow does not fall in June through September.

Does it snow in September?

In Wilkes-Barre, in September, it doesn't snow. In October, it regularly snows.

How many hours of daylight does Wilkes-Barre have in September?

In September, the average day length in Wilkes-Barre, Pennsylvania, is 12h and 28min.

When are sunrise and sunset in September?

On the first day of September, sunrise is at 6:30 am and sunset at 7:35 pm. On the last day of the month, sunrise is at 6:59 am and sunset at 6:46 pm EDT.

How long on average sun shines in September?

In September, the average sunshine duration is 8.6h.

What is the UV index intensity in September?

The average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a moderate vulnerability from exposure to the Sun's 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
Wilkes-Barre, PA

Average temperature in September - Wilkes-Barre, PA
  • Average high temperature in September: 71.4°F

The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (30.6°F).

  • Average low temperature in September: 51.6°F

The month with the highest average low temperature is July (59.2°F).
The coldest month (with the lowest average low temperature) is January (18.7°F).

Average pressure in September
Wilkes-Barre, PA

Average pressure in September - Wilkes-Barre, PA
  • Average pressure in September: 30.07"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).

Average wind speed in September
Wilkes-Barre, PA

Average wind speed in September - Wilkes-Barre, PA
  • Average wind speed in September: 5.8mph

The windiest months (with the highest average wind speed) are March and April (8.1mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).

Average humidity in September
Wilkes-Barre, PA

Average humidity in September - Wilkes-Barre, PA
  • Average humidity in September: 80%

The months with the highest relative humidity are February and December (84%).
The month with the lowest relative humidity is April (77%).

Average rainfall in September
Wilkes-Barre, PA

Average rainfall in September - Wilkes-Barre, PA
  • Average rainfall in September: 0.71"

The wettest month (with the highest rainfall) is July (1.5").
The driest month (with the least rainfall) is September (0.71").

Average rainfall days in September
Wilkes-Barre, PA

Average rainfall days in September - Wilkes-Barre, PA
  • Average rainfall days in September: 9.9 days

The month with the highest number of rainy days is May (15.4 days).
The month with the least rainy days is January (8.3 days).

Average snowfall in September
Wilkes-Barre, PA

Average snowfall in September - Wilkes-Barre, PA
  • Average snowfall in September: 0"

The month with the highest snowfall is February (2.83").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in September
Wilkes-Barre, PA

Average snowfall days in September - Wilkes-Barre, PA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (13.7 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in September /
Average sunshine in September
Wilkes-Barre, PA

Average daylight in September / Average sunshine in September - Wilkes-Barre, PA
  • 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 12min).
The months with the least sunshine are January and February (Average sunshine: 3h and 42min).

Average sunshine days in September
Wilkes-Barre, PA

Average sunshine days in September - Wilkes-Barre, PA
  • Average sunshine days in September: 16.8 days

The month with the most sunshine days is November (16.9 days).
The month with the least sunshine days is February (11.6 days).

Average UV index in September
Wilkes-Barre, PA

Average UV index in September - Wilkes-Barre, PA
  • Average UV index in September: 3

The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is December (UV index 1).

Average cloud cover in September
Wilkes-Barre, PA

Average cloud cover in September - Wilkes-Barre, PA
  • Average cloud cover in September: 42

The month with the most cloud cover is February (Cloud cover 61).
The month with the least cloud cover is July (Cloud cover 36).

Average visibility in September
Wilkes-Barre, PA

Average visibility in September - Wilkes-Barre, PA
  • Average visibility in September: 5mi

The month with the highest visibility is April (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October, November and December (5mi).

Wilkes-Barre, Pennsylvania, USA

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