September weather forecast
Clarks Green, PA

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Weather in September

September, the first month of the autumn in Clarks Green, is still a pleasant month, with an average temperature ranging between min 51.1°F (10.6°C) and max 71.2°F (21.8°C).

Temperature

During the shift to September, Clarks Green records a mild decrease in average high-temperature, moving from a moderately hot 77.9°F (25.5°C) in August to a pleasant 71.2°F (21.8°C). September brings with it a nighttime average temperature of 51.1°F (10.6°C).

Humidity

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

Rainfall

The month with the least rainfall is September, when the rain falls for 12.6 days and typically collects 2.01" (51mm) of precipitation.

Snowfall

In Clarks Green, 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 September in Clarks Green, sunrise is at 6:29 am and sunset at 7:35 pm. On the last day of the month, sunrise is at 6:59 am and sunset at 6:45 pm EDT.

Sunshine

The average sunshine in September in Clarks Green is 8.5h.

UV index

The average daily maximum UV index in September in Clarks Green is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: The UV index of 3 during September leads to these advisories:
Exercise prevention - Precautions against solar damage are endorsed. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
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Frequently asked questions

What is the usual temperature for Clarks Green in September?

During September, Clarks Green experiences an average high-temperature of 71.2°F (21.8°C) and a low-temperature of 51.1°F (10.6°C). In July, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, is evaluated at 84.2°F (29°C).

What is the average humidity in September in Clarks Green?

In September, the average relative humidity is 80%.

What is the driest month in Clarks Green?

September is the month with the least rainfall in Clarks Green. Rain falls for 12.6 days and accumulates 2.01" (51mm) of precipitation.

How much does it rain in Clarks Green in September?

In September, in Clarks Green, the rain falls for 12.6 days. Throughout September, 2.01" (51mm) of precipitation is accumulated.

When it does not snow in Clarks Green?

In Clarks Green, snow does not fall in June through September.

Does it snow in Clarks Green in September?

In Clarks Green, in September, it doesn't snow. In October, it regularly snows.

How many hours of daylight does Clarks Green have in September?

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

When are sunrise and sunset in September in Clarks Green?

In September, on the first day of the month, sunrise is at 6:29 am and sunset at 7:35 pm. On the last day of the month, in Clarks Green, sunrise is at 6:59 am and sunset at 6:45 pm EDT.

How long on average sun shines in September in Clarks Green?

In Clarks Green, Pennsylvania, the average sunshine duration in September is 8.5h.

How high is the UV index in September in Clarks Green?

The average daily maximum UV index in September in Clarks Green, Pennsylvania, is 3. A UV Index of 3 to 5 symbolizes a medium hazard to health from unsafe 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
Clarks Green, PA

Average temperature in September - Clarks Green, PA
  • Average high temperature in September: 71.2°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 (29.8°F).

  • Average low temperature in September: 51.1°F

The month with the highest average low temperature is July (58.6°F).
The coldest month (with the lowest average low temperature) is January (18°F).

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Average pressure in September
Clarks Green, PA

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

The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

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Average wind speed in September
Clarks Green, PA

Average wind speed in September - Clarks Green, PA
  • Average wind speed in September: 5.8mph

The windiest months (with the highest average wind speed) are January, February, March and April (8.1mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).

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Average humidity in September
Clarks Green, PA

Average humidity in September - Clarks Green, PA
  • Average humidity in September: 80%

The month with the highest relative humidity is February (85%).
The month with the lowest relative humidity is July (77%).

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Average rainfall in September
Clarks Green, PA

Average rainfall in September - Clarks Green, PA
  • Average rainfall in September: 2.01"

The wettest month (with the highest rainfall) is July (3.15").
The driest month (with the least rainfall) is September (2.01").

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Average rainfall days in September
Clarks Green, PA

Average rainfall days in September - Clarks Green, PA
  • Average rainfall days in September: 12.6 days

The month with the highest number of rainy days is May (19.3 days).
The month with the least rainy days is January (7.3 days).

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Average snowfall in September
Clarks Green, PA

Average snowfall in September - Clarks Green, PA
  • Average snowfall in September: 0"

The month with the highest snowfall is February (9.13").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Clarks Green, PA

Average snowfall days in September - Clarks Green, PA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (16.7 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
Clarks Green, PA

Average daylight in September / Average sunshine in September - Clarks Green, 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 12min).

  • Average sunshine in September: 8h and 3min

The month with the most sunshine is July (Average sunshine: 10h and 6min).
The months with the least sunshine are January and February (Average sunshine: 3h and 24min).

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Average sunshine days in September
Clarks Green, PA

Average sunshine days in September - Clarks Green, PA
  • Average sunshine days in September: 15 days

The month with the most sunshine days is September (15 days).
The month with the least sunshine days is May (9.3 days).

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Average UV index in September
Clarks Green, PA

Average UV index in September - Clarks Green, 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
Clarks Green, PA

Average cloud cover in September - Clarks Green, PA
  • Average cloud cover in September: 44

The months with the most cloud cover are January, February and December (Cloud cover 65).
The month with the least cloud cover is July (Cloud cover 38).

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Average visibility in September
Clarks Green, PA

Average visibility in September - Clarks Green, PA
  • Average visibility in September: 5mi

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

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Clarks Green, Pennsylvania, USA

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