September weather forecast and climate
Charleston, West VA

The calm Kanawha River in front of Charleston, West Virginia, reflecting the city in its water
The calm Kanawha River in front of Charleston, West Virginia, reflecting the city in its water
September, the first month of the autumn, in Charleston, is also a moderately hot month, with average temperature fluctuating between 77.9°F (25.5°C) and 56.7°F (13.7°C).

Temperature

In September, the average high-temperature marginally drops, from a warm 84.6°F (29.2°C) in August, to a still moderately hot 77.9°F (25.5°C). The average low-temperature, in September, is 56.7°F (13.7°C).

Humidity

In Charleston, West Virginia, the average relative humidity in September is 77%.

Rainfall

September is the month with the least rainfall in Charleston, West Virginia. Rain falls for 13.9 days and accumulates 1.81" (46mm) of precipitation.

Snowfall

June through September are months without snowfall in Charleston.

Daylight

In Charleston, the average length of the day in September is 12.4h.

Sunshine

The average sunshine in Charleston is 8.3h.

UV index

In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to the UV radiation for the average person.
Note: The daily maximum UV index of 4 interpret into the following advice:
Take precautions - Protection against the skin and eye damage is obliged. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.

What is the temperature in September in Charleston?

The average high-temperature, in September, in Charleston, is 77.9°F (25.5°C), while the average low-temperature is 56.7°F (13.7°C).

What is the average humidity in September in Charleston?

In September, the average relative humidity in Charleston, West Virginia, is 77%.

How many days does it rain in September in Charleston?

In September, in Charleston, West Virginia, the rain falls for 13.9 days. Throughout September, 1.81" (46mm) of precipitation is accumulated.

What is the driest month in Charleston?

The month with the least rainfall in Charleston, West Virginia, is September when the rain falls for 13.9 days and typically collects 1.81" (46mm) of precipitation.

Does it snow in Charleston in September?

In Charleston, West Virginia, in September, it doesn't snow. In October, it regularly snows.

When it does not snow in Charleston?

In Charleston snow does not fall in June through September.

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

In September, the average length of the day is 12.4h.

How long on average sun shines in September in Charleston?

In Charleston, West Virginia, the average sunshine in September is 8.3h.

What is the UV index intensity in September in Charleston?

In Charleston, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium hazard to health from unsafe exposure to the Sun's UV rays.
Average temperature in September - Charleston, West VA
  • Average high temperature in September: 77.9°F

The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (38.7°F).

  • Average low temperature in September: 56.7°F

The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (25.3°F).

Average pressure in September - Charleston, West VA
  • Average pressure in September: 30.06"

The month with the highest atmospheric pressure is November (30.16").
The month with the lowest atmospheric pressure is June (29.98").

Average wind speed in September - Charleston, West VA
  • Average wind speed in September: 4.3mph

The windiest month (with the highest average wind speed) is February (6.6mph).
The calmest month (with the lowest average wind speed) is August (4mph).

Average humidity in September - Charleston, West VA
  • Average humidity in September: 77%

Months with the highest relative humidity are January and February (82%).
Months with the lowest relative humidity are June, July, August and November (76%).

Average rainfall in September - Charleston, West VA
  • Average rainfall in September: 1.81"

The wettest month (with the highest rainfall) is May (3.94").
The driest month (with the least rainfall) is September (1.81").

Average rainfall days in September - Charleston, West VA
  • Average rainfall days in September: 13.9 days

The month with the highest number of rainy days is May (20.1 days).
The month with the least rainy days is November (11 days).

Average snowfall in September - Charleston, West VA
  • Average snowfall in September: 0"

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

Average snowfall days in September - Charleston, West VA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (14.1 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average daylight in September / Average sunshine in September - Charleston, West VA
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.8h).
The month with the shortest days is December (Average daylight: 9.5h).

  • Average sunshine in September: 8.3h

The month with the most sunshine is August (Average sunshine: 10.2h).
The month with the least sunshine is January (Average sunshine: 3.7h).

Average sunshine days in September - Charleston, West VA
  • Average sunshine days in September: 13.5 days

Months with the most sunshine days are October and November (16.5 days).
The month with the least sunshine days is February (8.4 days).

Average UV index in September - Charleston, West VA
  • Average UV index in September: 4

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

Average cloud cover in September - Charleston, West VA
  • Average cloud cover in September: 37

The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 33).

Average visibility in September - Charleston, West VA
  • Average visibility in September: 5mi

Months with the highest visibility are April and November (6mi).
Months with the lowest visibility are January, February, March, May, June, July, August, September, October and December (5mi).