Contents
- Weather in August
- Frequently asked questions
- Average temperature in August
- Average pressure in August
- Average wind speed in August
- Average humidity in August
- Average rainfall in August
- Average rainfall days in August
- Average snowfall in August
- Average snowfall days in August
- Average daylight in August
- Average sunshine in August
- Average sunshine days in August
- Average UV index in August
- Average cloud cover in August
- Average visibility in August
Weather in August
Temperature
Charleston records an average high-temperature of a still tropical 87.4°F (30.8°C) in August, maintaining a close correlation with July's 87.8°F (31°C). Despite drastic daily temperature oscillations, Charleston cools down to an average low-temperature of 65.8°F (18.8°C) in August.Heat index
For most parts of August, the heat index is evaluated at a torrid 102.2°F (39°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.Take into consideration that the heat index values are calculated for shade and light wind conditions. Heat index values may be hiked up by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'felt air temperature' or 'real feel', arises from combining readings of air temperature and relative moisture content. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. Be mindful that being in direct sunlight might mean feeling hotter, with the heat index rising by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Youngsters are usually more at risk than adults, considering they sweat less. Additionally, their high skin surface area compared to their little bodies and their high heat production due to activity increases their risk.
Perspiration, followed by sweat evaporation, is the human body's chief method to maintain a balanced temperature. When the air contains significant moisture, the efficiency of the evaporation process decreases, preventing the body from cooling down effectively and creating a feeling of overheating. Excessive heat gain, when not shed effectively by the body, can result in increasing body temperatures and related hazards.
Humidity
The months with the lowest humidity in Charleston are June through November, with an average relative humidity of 75%.Rainfall
In Charleston, Tennessee, in August, it is raining for 14.8 days, with typically 2.44" (62mm) of accumulated precipitation. In Charleston, during the entire year, the rain falls for 148 days and collects up to 23.9" (607mm) of precipitation.Snowfall
In Charleston, snow does not fall in April through October.Daylight
In Charleston, the average length of the day in August is 13h and 27min.On the first day of the month, sunrise is at 6:48 am and sunset at 8:42 pm. On the last day of August, sunrise is at 7:11 am and sunset at 8:06 pm EDT.
Sunshine
The average sunshine in August in Charleston is 9.6h.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 reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: During August, 6 as the daily maximum UV index converts into the following advice:
Guard against overexposure. Protection from sun-induced harm is essential. Avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is most intense, and remember that not all shade structures provide full protection. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in Charleston in August?
What are the least humid months in Charleston?
What is the average humidity in August in Charleston?
How much does it rain in Charleston in August?
When it does not snow in Charleston?
How many hours of daylight does Charleston have in August?
What time are sunrise and sunset in August in Charleston?
How long on average sun shines in August in Charleston?
What are the months with the highest UV index in Charleston?
How high is the UV index in August in Charleston?
Average temperature in August
Charleston, TN
- Average high temperature in August: 87.4°F
The warmest month (with the highest average high temperature) is July (87.8°F).
The month with the lowest average high temperature is January (46.4°F).
- Average low temperature in August: 65.8°F
The month with the highest average low temperature is July (66.4°F).
The coldest month (with the lowest average low temperature) is January (30.9°F).
Average pressure in August
Charleston, TN
- Average pressure in August: 30.01"Hg
The months with the highest atmospheric pressure are January and November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).
Average wind speed in August
Charleston, TN
- Average wind speed in August: 3.8mph
The windiest month (with the highest average wind speed) is February (6.6mph).
The calmest month (with the lowest average wind speed) is August (3.8mph).
Average humidity in August
Charleston, TN
- Average humidity in August: 75%
The month with the highest relative humidity is December (80%).
The months with the lowest relative humidity are June, July, August, September, October and November (75%).
Average rainfall in August
Charleston, TN
- Average rainfall in August: 2.44"
The wettest month (with the highest rainfall) is July (2.64").
The driest month (with the least rainfall) is September (1.3").
Average rainfall days in August
Charleston, TN
- Average rainfall days in August: 14.8 days
The month with the highest number of rainy days is July (17 days).
The month with the least rainy days is November (7.3 days).
Average snowfall in August
Charleston, TN
- Average snowfall in August: 0"
The month with the highest snowfall is February (0.75").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in August
Charleston, TN
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is February (1.7 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Charleston, TN
- Average daylight in August: 13h and 2min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in August: 9h and 4min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).
Average sunshine days in August
Charleston, TN
- Average sunshine days in August: 12.9 days
The months with the most sunshine days are October and November (21.2 days).
The month with the least sunshine days is July (11.6 days).
Average UV index in August
Charleston, TN
- 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).
Average cloud cover in August
Charleston, TN
- Average cloud cover in August: 31
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is June (Cloud cover 29).
Average visibility in August
Charleston, TN
- Average visibility in August: 6mi
The months with the highest visibility are February, March, April, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, May and December (5mi).
Charleston, Tennessee, USA
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