September weather forecast
Clarksburg, WV

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Beautiful cityscape of Clarksburg in West Virginia, with the dense tree cover and the dramatic landscape beyond
Beautiful cityscape of Clarksburg in West Virginia, with the dense tree cover and the dramatic landscape beyond

Weather in September

September denotes the transition from scalding summer temperatures to the mild fall weather in Clarksburg. The earthy aroma fills the air as temperatures drop, signalling the autumnal change. Slow transformations occur in the trees as the foliage starts to turn. A reduction in rainfall and the noticeable shortening of days herald the approaching end of summer. With calm winds and clear skies, autumn prepares to sweep Clarksburg in its refreshing embrace.

Temperature

The transition into September in Clarksburg is accompanied by a slight temperature decrease, with the average high-temperature shifting from a warm 82°F (27.8°C) in August to a still moderately hot 76.3°F (24.6°C). With a notable difference from peak temperatures, an average of 54.7°F (12.6°C) marks the nights in September.

Humidity

In Clarksburg, the average relative humidity in September is 78%.

Rainfall

The month with the least rainfall is September, when the rain falls for 15.2 days and typically collects 2.09" (53mm) of precipitation.

Snowfall

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

Daylight

In September, the average length of the day is 12h and 26min.
On the first day of the month, sunrise is at 6:50 am and sunset at 7:51 pm. On the last day of September, in Clarksburg, sunrise is at 7:17 am and sunset at 7:05 pm EDT.

Sunshine

The average sunshine in September is 8.7h.

UV index

In Clarksburg, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In September, a regular UV index of 4 translates into these guidelines:
Act with care - The need to guard against sun damage is communicated. Direct Sun exposure should be minimized especially during midday when radiation is most intense. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Updated: Feb 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in Clarksburg in September?

In Clarksburg, 76.3°F (24.6°C) is the average high-temperature and 54.7°F (12.6°C) is the average low-temperature during September. In August, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, is estimated at 87.8°F (31°C).

What is the average humidity in September in Clarksburg?

In Clarksburg, West Virginia, the average relative humidity in September is 78%.

What is the driest month in Clarksburg?

September is the month with the least rainfall in Clarksburg. Rain falls for 15.2 days and accumulates 2.09" (53mm) of precipitation.

How many days does it rain in September in Clarksburg?

In September, the rain falls for 15.2 days. Throughout September, 2.09" (53mm) of precipitation is accumulated.

When it does not snow in Clarksburg?

June through September are months without snowfall in Clarksburg.

Does it snow in Clarksburg in September?

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

What is the average length of the day in September in Clarksburg?

In September, the average day length in Clarksburg, West Virginia, is 12h and 26min.

When is the sunrise / sunset in September in Clarksburg?

In September, on the first day of the month, sunrise is at 6:50 am and sunset at 7:51 pm. On the last day of the month, in Clarksburg, sunrise is at 7:17 am and sunset at 7:05 pm EDT.

How many hours of sunshine does Clarksburg have in September?

The average sunshine duration in September in Clarksburg is 8.7h.

What is the UV index intensity in September in Clarksburg?

The average daily maximum UV index in September in Clarksburg is 4. A UV Index value of 3 to 5 symbolizes a medium hazard to health from exposure to the Sun's 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
Clarksburg, WV

Average temperature in September - Clarksburg, WV
  • Average high temperature in September: 76.3°F

The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (35.8°F).

  • Average low temperature in September: 54.7°F

The month with the highest average low temperature is July (61.5°F).
The coldest month (with the lowest average low temperature) is January (22.6°F).

Average pressure in September
Clarksburg, WV

Average pressure in September - Clarksburg, WV
  • Average pressure in September: 30.05"Hg

The month with the highest atmospheric pressure is November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).

Average wind speed in September
Clarksburg, WV

Average wind speed in September - Clarksburg, WV
  • Average wind speed in September: 4.4mph

The windiest months (with the highest average wind speed) are January and February (6.9mph).
The calmest month (with the lowest average wind speed) is August (4.1mph).

Average humidity in September
Clarksburg, WV

Average humidity in September - Clarksburg, WV
  • Average humidity in September: 78%

The month with the highest relative humidity is February (84%).
The months with the lowest relative humidity are July, August and November (77%).

Average rainfall in September
Clarksburg, WV

Average rainfall in September - Clarksburg, WV
  • Average rainfall in September: 2.09"

The wettest month (with the highest rainfall) is May (4.17").
The driest month (with the least rainfall) is September (2.09").

Average rainfall days in September
Clarksburg, WV

Average rainfall days in September - Clarksburg, WV
  • Average rainfall days in September: 15.2 days

The month with the highest number of rainy days is May (20.4 days).
The month with the least rainy days is November (11.8 days).

Average snowfall in September
Clarksburg, WV

Average snowfall in September - Clarksburg, WV
  • Average snowfall in September: 0"

The month with the highest snowfall is January (7.52").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in September
Clarksburg, WV

Average snowfall days in September - Clarksburg, WV
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (16.4 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in September /
Average sunshine in September
Clarksburg, WV

Average daylight in September / Average sunshine in September - Clarksburg, WV
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in September: 8h and 4min

The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 18min).

Average sunshine days in September
Clarksburg, WV

Average sunshine days in September - Clarksburg, WV
  • Average sunshine days in September: 12.2 days

The month with the most sunshine days is October (13.8 days).
The month with the least sunshine days is January (7.4 days).

Average UV index in September
Clarksburg, WV

Average UV index in September - Clarksburg, WV
  • Average UV index in September: 4

The months with the highest UV index are May, June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in September
Clarksburg, WV

Average cloud cover in September - Clarksburg, WV
  • Average cloud cover in September: 37

The month with the most cloud cover is January (Cloud cover 67).
The month with the least cloud cover is August (Cloud cover 35).

Average visibility in September
Clarksburg, WV

Average visibility in September - Clarksburg, WV
  • Average visibility in September: 5mi

The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January and February (4mi).

Clarksburg, West Virginia, USA

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