August weather forecast
Charleston International Airport, SC

With August comes a slight relief from the peak temperatures of July, yet maintaining the overall summer vibe in Charleston. The temperatures remain consistent, peaking at 84°F (28.9°C), and the days showcase amiable weather patterns. The atmosphere transitions towards the end, gearing up for the following autumn months. The rainfall overture has slightly less intensity than that of July, yet enough precipitation is recorded. The sun continues to be a significant part of August weather, adding warmth and light to the pleasant summer evenings.

Temperature

In August, Charleston International Airport experiences a barely noticeable shift in meteorological conditions, with average high-temperatures moving from 86°F (30°C) in July to a warm 84.2°F (29°C). August witnesses a substantial contrast between the daytime highs and the average low of 62.6°F (17°C).

Rainfall

In Charleston International Airport, in August, it is raining for 11 days, with typically 4.02" (102mm) of accumulated precipitation. In Charleston International Airport, during the entire year, the rain falls for 151 days and collects up to 41.93" (1065mm) of precipitation.

Daylight

In August, the average length of the day is 13h and 20min.
On the first day of the month, sunrise is at 6:34 am and sunset at 8:18 pm. On the last day of August, sunrise is at 6:54 am and sunset at 7:45 pm EDT.

Sunshine

The months with the most sunshine are May through August, with an average of 8h of sunshine.

UV index

The months with the highest UV index are June through August, with an average maximum UV index of 9. A UV Index estimate of 8 to 10 represents a very high health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.
Note: An average maximum UV index of 9 in August leads to these recommendations:
Always be cautious. Skin and eyes can be affected swiftly without protection. Limit your exposure to the sun's UV radiation, which is strongest between 10 a.m. and 4 p.m., and note that parasols or canopies may not provide full sun protection. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Stay protected under the Sun by applying sunscreen of 30 SPF or higher. This also decreases the risk of damage to the immune system.