September weather forecast
Glenlake, PA

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Weather in September

September, the first month of the autumn in Glenlake, is also a moderately hot month, with temperature in the range of an average low of 59.9°F (15.5°C) and an average high of 76.5°F (24.7°C).

Temperature

The onset of September aligns with a soft reduction in the average high-temperature, gently falling from 83.1°F (28.4°C) in August to a still warm 76.5°F (24.7°C). Throughout the month of September, the nighttime temperature dips to an average of 59.9°F (15.5°C).

Humidity

In Glenlake, the average relative humidity in September is 76%.

Rainfall

In Glenlake, during September, the rain falls for 12.7 days and regularly aggregates up to 1.93" (49mm) of precipitation. In Glenlake, during the entire year, the rain falls for 154.4 days and collects up to 31.38" (797mm) of precipitation.

Snowfall

In Glenlake, Pennsylvania, snow does not fall in June through October.

Daylight

In Glenlake, the average length of the day in September is 12h and 27min.
On the first day of September, sunrise is at 6:27 am and sunset at 7:30 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 6:43 pm EDT.

Sunshine

In September, the average sunshine is 8.8h.

UV index

In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the average person.
Note: The maximum daily UV index, 4 in September, converts into the following recommendations:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Stay sun-safe with clothing that is both closely woven and worn loosely.
Updated: Jul 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in September?

In Glenlake, 76.5°F (24.7°C) is the average high-temperature and 59.9°F (15.5°C) is the average low-temperature during September. The average heat index (a.k.a. 'real feel', 'apparent temperature'), which combines relative humidity and air temperature, in August is computed to be 89.6°F (32°C).

What is the average humidity in September?

In September, the average relative humidity is 76%.

How much does it rain in September?

In Glenlake, in September, it is raining for 12.7 days, with typically 1.93" (49mm) of accumulated precipitation.

When it does not snow?

June through October are months without snowfall.

How many hours of daylight does Glenlake have in September?

In September, the average day length in Glenlake, Pennsylvania, is 12h and 27min.

When is the sunrise / sunset in September?

In September, on the first day of the month, sunrise is at 6:27 am and sunset at 7:30 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 6:43 pm EDT.

How many hours of sunshine does Glenlake have in September?

In September, the average sunshine duration is 8.8h.

How high is the UV index in September?

In Glenlake, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium hazard to health 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
Glenlake, PA

Average temperature in September - Glenlake, PA
  • Average high temperature in September: 76.5°F

The warmest month (with the highest average high temperature) is July (85.5°F).
The month with the lowest average high temperature is January (37°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 (25.2°F).

Average pressure in September
Glenlake, PA

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

The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in September
Glenlake, PA

Average wind speed in September - Glenlake, PA
  • Average wind speed in September: 6mph

The windiest month (with the highest average wind speed) is March (8.6mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).

Average humidity in September
Glenlake, PA

Average humidity in September - Glenlake, PA
  • Average humidity in September: 76%

The months with the highest relative humidity are February and October (78%).
The month with the lowest relative humidity is April (72%).

Average rainfall in September
Glenlake, PA

Average rainfall in September - Glenlake, PA
  • Average rainfall in September: 1.93"

The wettest month (with the highest rainfall) is July (3.66").
The driest month (with the least rainfall) is January (1.89").

Average rainfall days in September
Glenlake, PA

Average rainfall days in September - Glenlake, PA
  • Average rainfall days in September: 12.7 days

The month with the highest number of rainy days is July (18.8 days).
The month with the least rainy days is January (8 days).

Average snowfall in September
Glenlake, PA

Average snowfall in September - Glenlake, PA
  • Average snowfall in September: 0"

The month with the highest snowfall is March (2.99").
The months with the least snowfall are June, July, August, September and October (0").

Average snowfall days in September
Glenlake, PA

Average snowfall days in September - Glenlake, PA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (4.8 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

Average daylight in September /
Average sunshine in September
Glenlake, PA

Average daylight in September / Average sunshine in September - Glenlake, 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 5min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).

Average sunshine days in September
Glenlake, PA

Average sunshine days in September - Glenlake, PA
  • Average sunshine days in September: 14.9 days

The month with the most sunshine days is November (20.6 days).
The month with the least sunshine days is July (9.9 days).

Average UV index in September
Glenlake, PA

Average UV index in September - Glenlake, PA
  • Average UV index in September: 4

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).

Average cloud cover in September
Glenlake, PA

Average cloud cover in September - Glenlake, PA
  • Average cloud cover in September: 37

The months with the most cloud cover are February and March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 32).

Average visibility in September
Glenlake, PA

Average visibility in September - Glenlake, PA
  • Average visibility in September: 6mi

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

Glenlake, Pennsylvania, USA

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