September weather forecast
Summerville, PA

Weather in September

The first month of the autumn, September, is also an agreeable month in Summerville, Pennsylvania, with an average temperature fluctuating between 72.1°F (22.3°C) and 52.2°F (11.2°C).

Temperature

In September, the average high-temperature slightly decreases from a warm 78.6°F (25.9°C) in August to a pleasant 72.1°F (22.3°C). The average low-temperature, in Summerville, Pennsylvania, is 52.2°F (11.2°C).

Humidity

In Summerville, the average relative humidity in September is 80%.

Rainfall

In Summerville, during September, the rain falls for 12.7 days and regularly aggregates up to 1.73" (44mm) of precipitation. Throughout the year, there are 150.5 rainfall days, and 22.05" (560mm) of precipitation is accumulated.

Snowfall

In Summerville, snow does not fall in June through September.

Daylight

The average length of the day in September is 12h and 28min.
On the first day of the month, sunrise is at 6:43 am and sunset at 7:50 pm. On the last day of September, in Summerville, sunrise is at 7:12 am and sunset at 7:01 pm EDT.

Sunshine

In September, the average sunshine is 8.3h.

UV index

The average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 3 in September interpret into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in September in Summerville?

In Summerville, Pennsylvania, in September, the average high-temperature is 72.1°F (22.3°C), and the average low-temperature is 52.2°F (11.2°C). in July, the average heat index (a.k.a. 'apparent temperature', 'real feel'), which factors the actual air temperature with the relative humidity, is evaluated at 86°F (30°C).

What is the average humidity in September in Summerville?

In September, the average relative humidity in Summerville is 80%.

How much does it rain in Summerville in September?

In Summerville, Pennsylvania, in September, it is raining for 12.7 days, with typically 1.73" (44mm) of accumulated precipitation.

When it does not snow in Summerville?

In Summerville, snow does not fall in June through September.

Does it snow in Summerville in September?

In Summerville, Pennsylvania, in September, it doesn't snow. In October, it regularly snows.

How many hours of daylight does Summerville have in September?

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

What time are sunrise and sunset in September in Summerville?

On the first day of September, sunrise is at 6:43 am and sunset at 7:50 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 7:01 pm EDT.

How long on average sun shines in September in Summerville?

The average sunshine duration in September is 8.3h.

What is the UV index reading in September in Summerville?

In September, the average daily maximum UV index in Summerville, Pennsylvania, is 3. A UV Index reading of 3 to 5 represents a medium health risk from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Summerville, PA

Average temperature in September - Summerville, PA
  • Average high temperature in September: 72.1°F

The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (30.2°F).

  • Average low temperature in September: 52.2°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 (17.8°F).

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Average pressure in September
Summerville, PA

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

The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

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Average wind speed in September
Summerville, PA

Average wind speed in September - Summerville, PA
  • Average wind speed in September: 6mph

The windiest month (with the highest average wind speed) is January (8.9mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).

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Average humidity in September
Summerville, PA

Average humidity in September - Summerville, PA
  • Average humidity in September: 80%

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

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Average rainfall in September
Summerville, PA

Average rainfall in September - Summerville, PA
  • Average rainfall in September: 1.73"

The wettest month (with the highest rainfall) is April (2.56").
The driest month (with the least rainfall) is November (1.26").

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Average rainfall days in September
Summerville, PA

Average rainfall days in September - Summerville, PA
  • Average rainfall days in September: 12.7 days

The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is January (7.2 days).

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Average snowfall in September
Summerville, PA

Average snowfall in September - Summerville, PA
  • Average snowfall in September: 0"

The month with the highest snowfall is February (5.51").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Summerville, PA

Average snowfall days in September - Summerville, PA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (18 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in September /
Average sunshine in September
Summerville, PA

Average daylight in September / Average sunshine in September - Summerville, PA
  • Average daylight in September: 12h and 28min

The month with the longest days is June (Average daylight: 15h and 5min).
The month with the shortest days is December (Average daylight: 9h and 16min).

  • Average sunshine in September: 8h and 18min

The months with the most sunshine are July and August (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 2h and 30min).

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Average sunshine days in September
Summerville, PA

Average sunshine days in September - Summerville, PA
  • Average sunshine days in September: 14.9 days

The month with the most sunshine days is November (15.3 days).
The month with the least sunshine days is February (8.1 days).

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Average UV index in September
Summerville, PA

Average UV index in September - Summerville, PA
  • Average UV index in September: 3

The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is December (UV index 1).

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Average cloud cover in September
Summerville, PA

Average cloud cover in September - Summerville, PA
  • Average cloud cover in September: 43

The month with the most cloud cover is January (Cloud cover 76).
The months with the least cloud cover are July and August (Cloud cover 39).

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Average visibility in September
Summerville, PA

Average visibility in September - Summerville, PA
  • Average visibility in September: 5mi

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

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