September weather forecast
Glen Mills, PA

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Weather in September

The first month of the autumn, September, is still a warm month in Glen Mills, Pennsylvania, with temperature in the range of an average low of 60.1°F (15.6°C) and an average high of 76.3°F (24.6°C).

Temperature

September indicates a minor shift in the average high-temperature, from August's warm 83.1°F (28.4°C) to a still moderately hot 76.3°F (24.6°C). An average low-temperature of 60.1°F (15.6°C) is noted during the month of September.

Humidity

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

Rainfall

In Glen Mills, in September, during 13.6 rainfall days, 2.44" (62mm) of precipitation is typically accumulated. In Glen Mills, during the entire year, the rain falls for 166.6 days and collects up to 35.59" (904mm) of precipitation.

Snowfall

June through September are months without snowfall.

Daylight

In September, the average length of the day in Glen Mills is 12h and 26min.
On the first day of the month, sunrise is at 6:30 am and sunset at 7:33 pm. On the last day of September, sunrise is at 6:58 am and sunset at 6:45 pm EDT.

Sunshine

The average sunshine in September in Glen Mills is 8.7h.

UV index

In September, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: In September, the UV index of 5 transforms into the following advice:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
Updated: Jul 20, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the usual temperature for Glen Mills in September?

The average high-temperature, in September, in Glen Mills, is 76.3°F (24.6°C), while the average low-temperature is 60.1°F (15.6°C). In August, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, is calculated to be 89.6°F (32°C).

What is the average humidity in September in Glen Mills?

In September, the average relative humidity is 76%.

How much does it rain in September?

In September, the rain falls for 13.6 days. Throughout September, 2.44" (62mm) of precipitation is accumulated.

When it does not snow in Glen Mills?

In Glen Mills, snow does not fall in June through September.

Does it snow in Glen Mills in September?

In Glen Mills, in September, it doesn't snow. In October, it regularly snows.

What is the average length of the day in September?

In Glen Mills, the average day length in September is 12h and 26min.

What time are sunrise and sunset in September?

On the first day of September, sunrise is at 6:30 am and sunset at 7:33 pm. On the last day of the month, sunrise is at 6:58 am and sunset at 6:45 pm EDT.

How long on average sun shines in September?

In Glen Mills, the average sunshine duration in September is 8.7h.

What is the UV index intensity in September?

In Glen Mills, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate health threat from 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
Glen Mills, PA

Average temperature in September - Glen Mills, PA
  • Average high temperature in September: 76.3°F

The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (37°F).

  • Average low temperature in September: 60.1°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 (25.3°F).

Average pressure in September
Glen Mills, PA

Average pressure in September - Glen Mills, PA
  • 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).

Average wind speed in September
Glen Mills, PA

Average wind speed in September - Glen Mills, PA
  • Average wind speed in September: 5.8mph

The windiest months (with the highest average wind speed) are January and March (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).

Average humidity in September
Glen Mills, PA

Average humidity in September - Glen Mills, 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
Glen Mills, PA

Average rainfall in September - Glen Mills, PA
  • Average rainfall in September: 2.44"

The wettest month (with the highest rainfall) is August (4.09").
The driest month (with the least rainfall) is January (2.36").

Average rainfall days in September
Glen Mills, PA

Average rainfall days in September - Glen Mills, PA
  • Average rainfall days in September: 13.6 days

The month with the highest number of rainy days is May (18.5 days).
The month with the least rainy days is January (8.6 days).

Average snowfall in September
Glen Mills, PA

Average snowfall in September - Glen Mills, PA
  • Average snowfall in September: 0"

The month with the highest snowfall is February (3.19").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in September
Glen Mills, PA

Average snowfall days in September - Glen Mills, PA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (6.9 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in September /
Average sunshine in September
Glen Mills, PA

Average daylight in September / Average sunshine in September - Glen Mills, 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 July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).

Average sunshine days in September
Glen Mills, PA

Average sunshine days in September - Glen Mills, PA
  • Average sunshine days in September: 14.1 days

The month with the most sunshine days is November (18.4 days).
The month with the least sunshine days is July (10 days).

Average UV index in September
Glen Mills, PA

Average UV index in September - Glen Mills, PA
  • 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).

Average cloud cover in September
Glen Mills, PA

Average cloud cover in September - Glen Mills, PA
  • Average cloud cover in September: 39

The months with the most cloud cover are February and March (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 32).

Average visibility in September
Glen Mills, PA

Average visibility in September - Glen Mills, PA
  • Average visibility in September: 5mi

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

Glen Mills, Pennsylvania, USA

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