September weather forecast
Rock Glen, PA

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Weather in September

September, the first month of the autumn in Rock Glen, is still a pleasant month, with temperature in the range of an average low of 52°F (11.1°C) and an average high of 72°F (22.2°C).

Temperature

September brings a slight decrease in the average high-temperature, shifting from a warm 78.4°F (25.8°C) in August to an agreeable 72°F (22.2°C). In the month of September, Rock Glen witnesses a consistent average low-temperature of 52°F (11.1°C).

Humidity

In September, the average relative humidity is 80%.

Rainfall

September is the month with the least rainfall. Rain falls for 8.9 days and accumulates 0.55" (14mm) of precipitation.

Snowfall

June through September are months without snowfall.

Daylight

In September, the average length of the day is 12h and 28min.
On the first day of the month, sunrise is at 6:32 am and sunset at 7:36 pm. On the last day of September, in Rock Glen, sunrise is at 7:01 am and sunset at 6:47 pm EDT.

Sunshine

In Rock Glen, Pennsylvania, the average sunshine in September is 8.3h.

UV index

The average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: In September, a daily UV index of 4 turns into the following recommendations:
Adopt protective measures - Suggestions to resist sunburn are offered. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Updated: Jul 30, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in September?

The high-temperature, in September, in Rock Glen, is 72°F (22.2°C), while the low-temperature averages to 52°F (11.1°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which combines relative humidity and air temperature, 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 in Rock Glen?

September is the month with the least rainfall. Rain falls for 8.9 days and accumulates 0.55" (14mm) of precipitation.

How many days does it rain in September?

In Rock Glen, during September, the rain falls for 8.9 days and regularly aggregates up to 0.55" (14mm) of precipitation.

When it does not snow?

June through September are months without snowfall.

Does it snow in September?

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

How many hours of daylight does Rock Glen have in September?

In Rock Glen, the average day length in September is 12h and 28min.

When are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 6:32 am and sunset at 7:36 pm. On the last day of the month, sunrise is at 7:01 am and sunset at 6:47 pm EDT.

How long on average sun shines in September?

The average sunshine duration in September is 8.3h.

How high is the UV index in September in Rock Glen?

In Rock Glen, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes 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
Rock Glen, PA

Average temperature in September - Rock Glen, PA
  • Average high temperature in September: 72°F

The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (31.5°F).

  • Average low temperature in September: 52°F

The month with the highest average low temperature is July (59.5°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).

Average pressure in September
Rock Glen, PA

Average pressure in September - Rock Glen, PA
  • Average pressure in September: 30.07"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
Rock Glen, PA

Average wind speed in September - Rock Glen, PA
  • Average wind speed in September: 5.7mph

The windiest month (with the highest average wind speed) is March (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).

Average humidity in September
Rock Glen, PA

Average humidity in September - Rock Glen, PA
  • Average humidity in September: 80%

The month with the highest relative humidity is February (84%).
The month with the lowest relative humidity is April (78%).

Average rainfall in September
Rock Glen, PA

Average rainfall in September - Rock Glen, PA
  • Average rainfall in September: 0.55"

The wettest month (with the highest rainfall) is May (1.26").
The driest month (with the least rainfall) is September (0.55").

Average rainfall days in September
Rock Glen, PA

Average rainfall days in September - Rock Glen, PA
  • Average rainfall days in September: 8.9 days

The month with the highest number of rainy days is May (13.8 days).
The month with the least rainy days is January (5.4 days).

Average snowfall in September
Rock Glen, PA

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

The month with the highest snowfall is February (1.81").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in September
Rock Glen, PA

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

The month with the highest number of snowfall days is January (9.9 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in September / Average sunshine in September - Rock Glen, 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 2min

The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is February (Average sunshine: 3h and 36min).

Average sunshine days in September
Rock Glen, PA

Average sunshine days in September - Rock Glen, PA
  • Average sunshine days in September: 18.6 days

The month with the most sunshine days is November (20.6 days).
The month with the least sunshine days is May (14.3 days).

Average UV index in September
Rock Glen, PA

Average UV index in September - Rock Glen, 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, October, November and December (UV index 2).

Average cloud cover in September
Rock Glen, PA

Average cloud cover in September - Rock Glen, PA
  • Average cloud cover in September: 43

The month with the most cloud cover is February (Cloud cover 61).
The month with the least cloud cover is July (Cloud cover 37).

Average visibility in September
Rock Glen, PA

Average visibility in September - Rock Glen, 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).

Rock Glen, Pennsylvania, USA

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