September weather forecast
Mount Pleasant, PA

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Weather in September

The first month of the autumn, September, is also a moderately hot month in Mount Pleasant, Pennsylvania, with an average temperature ranging between min 54.1°F (12.3°C) and max 74.3°F (23.5°C).

Temperature

September brings a slight decrease in temperature, down from 80.6°F (27°C) in August to a still warm 74.3°F (23.5°C). In Mount Pleasant, the average low-temperature during the month of September is a cool 54.1°F (12.3°C).

Humidity

In September, the average relative humidity is 78%.

Rainfall

In Mount Pleasant, during September, the rain falls for 15.3 days and regularly aggregates up to 2.2" (56mm) of precipitation. Throughout the year, there are 185.4 rainfall days, and 34.02" (864mm) of precipitation is accumulated.

Snowfall

In Mount Pleasant, snow does not fall in June through September.

Daylight

In September, the average length of the day is 12h and 26min.
On the first day of September, sunrise is at 6:46 am and sunset at 7:49 pm. On the last day of the month, sunrise is at 7:14 am and sunset at 7:01 pm EDT.

Sunshine

In Mount Pleasant, the average sunshine in September is 8.8h.

UV index

The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: A typical high UV index of 4 in September suggests the following recommendations:
Put precautions into practice - Protective measures against sun-induced damage are advised. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
Updated: Aug 16, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the temperature in September?

The average high-temperature, in September, in Mount Pleasant, is 74.3°F (23.5°C), while the average low-temperature is 54.1°F (12.3°C). The average heat index (a.k.a. 'real feel', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, in August is computed to be 84.2°F (29°C).

What is the average humidity in September?

In September, the average relative humidity is 78%.

How many days does it rain in September in Mount Pleasant?

In Mount Pleasant, in September, during 15.3 rainfall days, 2.2" (56mm) of precipitation is typically accumulated.

When it does not snow?

In Mount Pleasant, snow does not fall in June through September.

Does it snow in September?

In Mount Pleasant, in September, it doesn't snow. In October, it regularly snows.

What is the average length of the day in September?

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

When are sunrise and sunset in September?

On the first day of September in Mount Pleasant, sunrise is at 6:46 am and sunset at 7:49 pm. On the last day of the month, sunrise is at 7:14 am and sunset at 7:01 pm EDT.

How many hours of sunshine does Mount Pleasant have in September?

In September, the average sunshine duration is 8.8h.

What is the UV index intensity in September?

The average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate vulnerability 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
Mount Pleasant, PA

Average temperature in September - Mount Pleasant, PA
  • Average high temperature in September: 74.3°F

The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (33.3°F).

  • Average low temperature in September: 54.1°F

The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is January (20.3°F).

Average pressure in September
Mount Pleasant, PA

Average pressure in September - Mount Pleasant, PA
  • Average pressure in September: 30.06"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).

Average wind speed in September
Mount Pleasant, PA

Average wind speed in September - Mount Pleasant, PA
  • Average wind speed in September: 5.3mph

The windiest month (with the highest average wind speed) is January (8.5mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

Average humidity in September
Mount Pleasant, PA

Average humidity in September - Mount Pleasant, PA
  • Average humidity in September: 78%

The months with the highest relative humidity are January and February (85%).
The months with the lowest relative humidity are April, July and August (77%).

Average rainfall in September
Mount Pleasant, PA

Average rainfall in September - Mount Pleasant, PA
  • Average rainfall in September: 2.2"

The wettest month (with the highest rainfall) is May (3.66").
The driest month (with the least rainfall) is November (2.01").

Average rainfall days in September
Mount Pleasant, PA

Average rainfall days in September - Mount Pleasant, PA
  • Average rainfall days in September: 15.3 days

The month with the highest number of rainy days is May (22 days).
The month with the least rainy days is January (9.8 days).

Average snowfall in September
Mount Pleasant, PA

Average snowfall in September - Mount Pleasant, PA
  • Average snowfall in September: 0"

The month with the highest snowfall is January (7.09").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in September
Mount Pleasant, PA

Average snowfall days in September - Mount Pleasant, PA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (17.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in September /
Average sunshine in September
Mount Pleasant, PA

Average daylight in September / Average sunshine in September - Mount Pleasant, 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 August (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).

Average sunshine days in September
Mount Pleasant, PA

Average sunshine days in September - Mount Pleasant, PA
  • Average sunshine days in September: 13.3 days

The month with the most sunshine days is November (13.5 days).
The month with the least sunshine days is January (6.5 days).

Average UV index in September
Mount Pleasant, PA

Average UV index in September - Mount Pleasant, PA
  • Average UV index in September: 4

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

Average cloud cover in September
Mount Pleasant, PA

Average cloud cover in September - Mount Pleasant, PA
  • Average cloud cover in September: 38

The month with the most cloud cover is January (Cloud cover 69).
The month with the least cloud cover is August (Cloud cover 35).

Average visibility in September
Mount Pleasant, PA

Average visibility in September - Mount Pleasant, PA
  • Average visibility in September: 5mi

The month with the highest visibility is April (6mi).
The months with the lowest visibility are January and February (4mi).

Mount Pleasant, Pennsylvania, USA

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