September weather forecastBig Run, PA

September

Weather in September

September, the first month of the autumn in Big Run, is still a pleasant month, with an average temperature fluctuating between 72.3°F (22.4°C) and 52.5°F (11.4°C).

Temperature

A subtle change in temperatures is noted as August gives way to September, with average highs reducing from a moderately hot 79.2°F (26.2°C) to a pleasant 72.3°F (22.4°C). In September, the recorded average low-temperature is a fresh 52.5°F (11.4°C).

Humidity

In September, the average relative humidity is 79%.

Rainfall

In Big Run, during September, the rain falls for 12.1 days and regularly aggregates up to 1.65" (42mm) of precipitation. In Big Run, during the entire year, the rain falls for 151.9 days and collects up to 22.13" (562mm) of precipitation.

Snowfall

In Big Run, snow does not fall in June through September.

Daylight

In September, the average length of the day is 12h and 27min.
On the first day of the month, sunrise is at 6:43 am and sunset at 7:47 pm. On the last day of September, sunrise is at 7:11 am and sunset at 6:58 pm EDT.

Sunshine

In September, the average sunshine is 8.2h.

UV index

In Big Run, the average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for average individuals.
Note: A typical high UV index of 3 in September suggests the following recommendations:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.

Updated: Aug 29, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

An average high-temperature, in September, in Big Run, is 72.3°F (22.4°C) and the average low-temperature is 52.5°F (11.4°C). In July, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which combines air temperature and relative humidity, is estimated at 86°F (30°C).

In Big Run, Pennsylvania, the average relative humidity in September is 79%.

In Big Run, in September, during 12.1 rainfall days, 1.65" (42mm) of precipitation is typically accumulated.

June through September are months without snowfall.

In Big Run, in September, it doesn't snow. In October, it regularly snows.

In Big Run, the average day length in September is 12h and 27min.

On the first day of September, sunrise is at 6:43 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 7:11 am and sunset at 6:58 pm EDT.

In Big Run, the average sunshine duration in September is 8.2h.

In Big Run, the average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a medium health risk from unsafe exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F M A M J J A September O N D

Aug

September

Oct

Average high temperature

79.2°F

72.3°F

59.4°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

6mph

6.3mph

8mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

14.6

15.3

14.3

Average UV index

Average cloud cover

Average visibility

Average temperature in September
Big Run, PA

Average high temperature in September: 72.3°F

The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (30.4°F).

Average low temperature in September: 52.5°F

The month with the highest average low temperature is July (58.8°F).
The coldest month (with the lowest average low temperature) is January (18.3°F).

Average pressure in September
Big Run, 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 (29.95"Hg).

Average wind speed in September
Big Run, PA

Average wind speed in September: 6mph

The windiest month (with the highest average wind speed) is January (9.1mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).

Average humidity in September
Big Run, PA

Average humidity in September: 79%

The month with the highest relative humidity is February (88%).
The months with the lowest relative humidity are June, July and August (78%).

Average rainfall in September
Big Run, PA

Average rainfall in September: 1.65"

The wettest month (with the highest rainfall) is April (2.48").
The driest month (with the least rainfall) is November (1.26").

Average rainfall days in September
Big Run, PA

Average rainfall days in September: 12.1 days

The month with the highest number of rainy days is May (18 days).
The month with the least rainy days is January (7.8 days).

Average snowfall in September
Big Run, PA

Average snowfall in September: 0"

The month with the highest snowfall is January (5.63").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in September
Big Run, PA

Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (18.6 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in September: 12h and 30min

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 12min

The months with the most sunshine are July and August (Average sunshine: 9h and 36min).
The month with the least sunshine is January (Average sunshine: 2h and 30min).