August weather forecast
Charleston, WV

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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

Weather in August

August in Charleston exudes distinct end-of-summer vibes, featuring warm temperatures and clear skies, with the highest average temperature being 84.6°F (29.2°C) throughout the month. Despite similar temperatures to July, August displays a subtle shift signaling the upcoming autumn. The city experiences slightly lesser rainfall, coupled with marginally shorter daylight hours. As the summer sun shines brightly, August brings tropical warmth combined with fading summer vibes.

Temperature

In Charleston, August's average high-temperature stands at a still moderately hot 84.6°F (29.2°C), closely related to the preceding month. A noteworthy thermal contrast characterizes Charleston's August nights, with temperatures averaging at a comfortable 61.3°F (16.3°C).

Heat index

For August, the heat index is computed to be a hot 93.2°F (34°C). Exercise more precautions, heat cramps and heat exhaustion are potential risks. Continuous activity could precipitate heatstroke.
Understand that the heat index values take into account shaded locations and mild winds. When under direct sunshine, the heat index may be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is a measure of how hot it feels when the actual air humidity is factored in. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. It is important to note that direct sunlight can intensify the weather impact, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Young ones generally face higher dangers than adults since they sweat less. Along with their large skin surface area compared totheir small bodies and increased heat production from their activities, the risks are heightened.

Humidity

June through August and November, with an average relative humidity of 76%, are the least humid months.

Rainfall

In August, in Charleston, the rain falls for 15.5 days. Throughout August, 2.09" (53mm) of precipitation is accumulated. Throughout the year, there are 180.4 rainfall days, and 34.06" (865mm) of precipitation is accumulated.

Snowfall

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

Daylight

The average length of the day in August is 13h and 37min.
On the first day of the month, sunrise is at 6:29 am and sunset at 8:36 pm. On the last day of August, in Charleston, sunrise is at 6:55 am and sunset at 7:57 pm EDT.

Sunshine

The month with the most sunshine in Charleston, West Virginia, is August, with an average of 10.2h of sunshine.

UV index

May through August, with an average maximum UV index of 6, are months with the highest UV index in Charleston. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for the average person.
Note: The daily high UV index of 6 in August translates into this advice:
Exercise precautions and adapt sun safety practices. Defence against skin and eye affliction is paramount. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
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Frequently asked questions

How hot is August in Charleston?

August temperatures in Charleston vary between a high-temperature of 84.6°F (29.2°C) and a low-temperature of 61.3°F (16.3°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which takes the relative humidity and factors it into the air temperature reading, in August is computed to be 93.2°F (34°C).

What is the least humid month in Charleston?

June through August and November, with an average relative humidity of 76%, are the least humid months in Charleston, West Virginia.

What is the average humidity in August in Charleston?

In Charleston, West Virginia, the average relative humidity in August is 76%.

How many days does it rain in August in Charleston?

In Charleston, during August, the rain falls for 15.5 days and regularly aggregates up to 2.09" (53mm) of precipitation.

When it does not snow in Charleston?

In Charleston, West Virginia, snow does not fall in June through September.

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

The average day length in August in Charleston is 13h and 37min.

When is the sunrise / sunset in August in Charleston?

On the first day of August in Charleston, West Virginia, sunrise is at 6:29 am and sunset at 8:36 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 7:57 pm EDT.

What month has the most sunshine in Charleston?

The month with the most sunshine in Charleston is August, with an average of 10.2h of sunshine.

How long on average sun shines in August in Charleston?

In Charleston, the average sunshine duration in August is 10.2h.

What are the months with the highest UV index in Charleston?

May through August, with an average maximum UV index of 6, are months with the highest UV index.

What is the UV index intensity in August in Charleston?

In August, the average daily maximum UV index in Charleston, West Virginia, is 6. A UV Index reading of 6 to 7 represents a high health risk from 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 August
Charleston, WV

Average temperature in August - Charleston, WV
  • Average high temperature in August: 84.6°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 August: 61.3°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).

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Average pressure in August
Charleston, WV

Average pressure in August - Charleston, WV
  • Average pressure in August: 30.02"Hg

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

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Average wind speed in August
Charleston, WV

Average wind speed in August - Charleston, WV
  • Average wind speed in August: 4mph

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).

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Average humidity in August
Charleston, WV

Average humidity in August - Charleston, WV
  • Average humidity in August: 76%

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

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Average rainfall in August
Charleston, WV

Average rainfall in August - Charleston, WV
  • Average rainfall in August: 2.09"

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

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Average rainfall days in August
Charleston, WV

Average rainfall days in August - Charleston, WV
  • Average rainfall days in August: 15.5 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).

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Average snowfall in August
Charleston, WV

Average snowfall in August - Charleston, WV
  • Average snowfall in August: 0"

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

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Average snowfall days in August
Charleston, WV

Average snowfall days in August - Charleston, WV
  • Average snowfall days in August: 0 days

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

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Average daylight in August /
Average sunshine in August
Charleston, WV

Average daylight in August / Average sunshine in August - Charleston, WV
  • Average daylight in August: 13h and 4min

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in August: 10h and 1min

The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).

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Average sunshine days in August
Charleston, WV

Average sunshine days in August - Charleston, WV
  • Average sunshine days in August: 13.9 days

The 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).

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Average UV index in August
Charleston, WV

Average UV index in August - Charleston, WV
  • Average UV index in August: 6

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

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Average cloud cover in August
Charleston, WV

Average cloud cover in August - Charleston, WV
  • Average cloud cover in August: 33

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

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Average visibility in August
Charleston, WV

Average visibility in August - Charleston, WV
  • Average visibility in August: 5mi

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

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Charleston, West Virginia, USA

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