September weather forecast
Dry Run, PA

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Weather in September

The first month of the autumn, September, is still a warm month in Dry Run, Pennsylvania, with an average temperature varying between 53.2°F (11.8°C) and 74.3°F (23.5°C).

Temperature

The advent of September brings a slight shift in average high-temperature, moving from 81.3°F (27.4°C) in August to a still moderately hot 74.3°F (23.5°C). The temperature dips to an average of 53.2°F (11.8°C) during September nights.

Humidity

In September, the average relative humidity is 79%.

Rainfall

September is the month with the least rainfall. Rain falls for 12.8 days and accumulates 1.85" (47mm) of precipitation.

Snowfall

May through September are months without snowfall.

Daylight

In Dry Run, the average length of the day in September is 12h and 26min.
On the first day of the month, sunrise is at 6:39 am and sunset at 7:42 pm. On the last day of September, sunrise is at 7:07 am and sunset at 6:54 pm EDT.

Sunshine

In September, the average sunshine in Dry Run, Pennsylvania, is 8.6h.

UV index

The average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: In September, the maximum UV index of 4 transforms into these recommendations:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
Updated: Jul 28, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average September temperature?

The high-temperature during September is 74.3°F (23.5°C) and the low-temperature is 53.2°F (11.8°C). In August, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which factors the actual air temperature with the relative humidity, is calculated to be 86°F (30°C).

What is the average humidity in September?

The average relative humidity in September is 79%.

What is the driest month?

September is the month with the least rainfall. Rain falls for 12.8 days and accumulates 1.85" (47mm) of precipitation.

How much does it rain in September?

In Dry Run, in September, during 12.8 rainfall days, 1.85" (47mm) of precipitation is typically accumulated.

When it does not snow?

May through September are months without snowfall.

Does it snow in September?

In Dry Run, 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 in Dry Run is 12h and 26min.

When is the sunrise / sunset in September?

In September, on the first day of the month, sunrise is at 6:39 am and sunset at 7:42 pm. On the last day of the month, sunrise is at 7:07 am and sunset at 6:54 pm EDT.

How long on average sun shines in September?

In September, the average sunshine duration is 8.6h.

How high is the UV index in September?

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

Average temperature in September - Dry Run, PA
  • Average high temperature in September: 74.3°F

The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (32.9°F).

  • Average low temperature in September: 53.2°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 (20.1°F).

Average pressure in September
Dry Run, PA

Average pressure in September - Dry Run, 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
Dry Run, PA

Average wind speed in September - Dry Run, PA
  • Average wind speed in September: 4.8mph

The windiest month (with the highest average wind speed) is January (7.8mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).

Average humidity in September
Dry Run, PA

Average humidity in September - Dry Run, PA
  • Average humidity in September: 79%

The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is July (75%).

Average rainfall in September
Dry Run, PA

Average rainfall in September - Dry Run, PA
  • Average rainfall in September: 1.85"

The wettest month (with the highest rainfall) is May (3.07").
The driest month (with the least rainfall) is September (1.85").

Average rainfall days in September
Dry Run, PA

Average rainfall days in September - Dry Run, PA
  • Average rainfall days in September: 12.8 days

The month with the highest number of rainy days is May (17.7 days).
The month with the least rainy days is February (9.5 days).

Average snowfall in September
Dry Run, PA

Average snowfall in September - Dry Run, PA
  • Average snowfall in September: 0"

The month with the highest snowfall is January (5.24").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in September
Dry Run, PA

Average snowfall days in September - Dry Run, PA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (12.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in September /
Average sunshine in September
Dry Run, PA

Average daylight in September / Average sunshine in September - Dry Run, 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 18min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).

Average sunshine days in September
Dry Run, PA

Average sunshine days in September - Dry Run, PA
  • Average sunshine days in September: 14.5 days

The month with the most sunshine days is November (16.7 days).
The month with the least sunshine days is May (10.7 days).

Average UV index in September
Dry Run, PA

Average UV index in September - Dry Run, PA
  • Average UV index in September: 4

The months with the highest UV index are May and June (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
Dry Run, PA

Average cloud cover in September - Dry Run, PA
  • Average cloud cover in September: 39

The month with the most cloud cover is January (Cloud cover 56).
The months with the least cloud cover are July and August (Cloud cover 34).

Average visibility in September
Dry Run, PA

Average visibility in September - Dry Run, 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).

Dry Run, Pennsylvania, USA

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