September weather forecast
Mount Penn, PA

Share

Weather in September

The first month of the autumn, September, is also a moderately hot month in Mount Penn, Pennsylvania, with an average temperature fluctuating between 56.3°F (13.5°C) and 74.8°F (23.8°C).

Temperature

The transition into September is accompanied by a slight temperature decrease, with the average high-temperature shifting from 80.6°F (27°C) in August to a still warm 74.8°F (23.8°C). During the nights in September, an average low-temperature of 56.3°F (13.5°C) is observed.

Humidity

In Mount Penn, the average relative humidity in September is 79%.

Rainfall

In September, in Mount Penn, the rain falls for 9.8 days. Throughout September, 0.94" (24mm) of precipitation is accumulated. In Mount Penn, Pennsylvania, during the entire year, the rain falls for 129 days and collects up to 13.5" (343mm) of precipitation.

Snowfall

In Mount Penn, snow does not fall in June through October.

Daylight

The average length of the day in September is 12h and 27min.
On the first day of September, sunrise is at 6:31 am and sunset at 7:34 pm. On the last day of the month, sunrise is at 6:59 am and sunset at 6:46 pm EDT.

Sunshine

The average sunshine in September is 8.9h.

UV index

In Mount Penn, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: The maximum UV index of 4 during September leads to these instructions:
Take necessary precautions - Defending against sun damage is advocated. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.

Frequently asked questions

What is the usual temperature for Mount Penn in September?

The average high-temperature and low-temperature during September are 74.8°F (23.8°C) and 56.3°F (13.5°C) respectively. The average heat index (a.k.a. 'apparent temperature', 'real feel'), which takes the relative humidity and factors it into the air temperature reading, in August is estimated at 86°F (30°C).

What is the average humidity in September?

The average relative humidity in September is 79%.

How many days does it rain in September?

In Mount Penn, during September, the rain falls for 9.8 days and regularly aggregates up to 0.94" (24mm) of precipitation.

When it does not snow?

June through October are months without snowfall.

What is the average length of the day in September?

In Mount Penn, the average day length in September is 12h and 27min.

When are sunrise and sunset in September in Mount Penn?

In September, on the first day of the month, sunrise is at 6:31 am and sunset at 7:34 pm. On the last day of the month, sunrise is at 6:59 am and sunset at 6:46 pm EDT.

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

In Mount Penn, the average sunshine duration in September is 8.9h.

How high is the UV index in September?

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

Average temperature in September - Mount Penn, PA
  • Average high temperature in September: 74.8°F

The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is January (35.2°F).

  • Average low temperature in September: 56.3°F

The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (22.5°F).

Average pressure in September
Mount Penn, PA

Average pressure in September - Mount Penn, PA
  • Average pressure in September: 30.06"Hg

The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

Average wind speed in September
Mount Penn, PA

Average wind speed in September - Mount Penn, PA
  • Average wind speed in September: 5.5mph

The windiest months (with the highest average wind speed) are January and March (8.3mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

Average humidity in September
Mount Penn, PA

Average humidity in September - Mount Penn, PA
  • Average humidity in September: 79%

The months with the highest relative humidity are February and October (81%).
The month with the lowest relative humidity is April (76%).

Average rainfall in September
Mount Penn, PA

Average rainfall in September - Mount Penn, PA
  • Average rainfall in September: 0.94"

The wettest month (with the highest rainfall) is August (1.69").
The driest month (with the least rainfall) is February (0.79").

Average rainfall days in September
Mount Penn, PA

Average rainfall days in September - Mount Penn, PA
  • Average rainfall days in September: 9.8 days

The month with the highest number of rainy days is May (15.7 days).
The month with the least rainy days is January (7.1 days).

Average snowfall in September
Mount Penn, PA

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

The month with the highest snowfall is February (1.54").
The months with the least snowfall are June, July, August, September and October (0").

Average snowfall days in September
Mount Penn, PA

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

The month with the highest number of snowfall days is January (6 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
Mount Penn, PA

Average daylight in September / Average sunshine in September - Mount Penn, 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 42min).

Average sunshine days in September
Mount Penn, PA

Average sunshine days in September - Mount Penn, PA
  • Average sunshine days in September: 17.8 days

The month with the most sunshine days is November (20.4 days).
The month with the least sunshine days is May (12.3 days).

Average UV index in September
Mount Penn, PA

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

The months with the highest UV index are May, June and 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 Penn, PA

Average cloud cover in September - Mount Penn, PA
  • Average cloud cover in September: 37

The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 31).

Average visibility in September
Mount Penn, PA

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

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

Mount Penn, Pennsylvania, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location