Charleston in August
In August, Charleston averages 30°C (86°F) during the day and 25°C (76°F) at night, with frequent rain — about 26 days of the month see precipitation (170 mm total).
ShoulderConditions are warm and beach-friendly. Expect daily rain or showers, often in heavy bursts.
It's peak hurricane season in Charleston during August. Travel is possible but expect storm risk, possible flight disruption, and generally lower travel insurance coverage.
How August compares to the rest of the year in Charleston
August is one of the warmest months in Charleston (2nd of 12) and one of the wettest months (1st of 12). Daytime temperature runs 7°C above the annual average (23°C). August runs 1°C cooler than July (31°C) and cools 2°C in September (28°C).
August sunrise & sunset in Charleston
Times shown for Charleston local time (America/New_York), calculated for the 15th of August. They shift by a few minutes day to day across the month.
Photography light in Charleston — August
Golden-hour and blue-hour windows for the 15th of August, in Charleston's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Charleston in August
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on August's tier (Shoulder) and Charleston's popularity.
Crowds & pricing — August in Charleston
Charleston is in a shoulder season month — fewer crowds, slightly lower prices, and a calmer atmosphere than peak weeks. Most major sights stay open with normal hours, though a handful of seasonal restaurants or boat trips may run reduced schedules. Many regulars consider these months the best time to visit because you trade a small amount of weather reliability for a much more pleasant on-the-ground experience.
Why this tier: Northern Hemisphere summer holidays peak hazard season (1 active)
Sun & mosquito risk — August in Charleston
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
Charleston in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 14°C / 58°F | 6°C / 44°F | 78 mm | 12 | — |
| February | 17°C / 62°F | 9°C / 48°F | 77 mm | 13 | — |
| March | 19°C / 67°F | 11°C / 53°F | 78 mm | 14 | — |
| April | 23°C / 73°F | 15°C / 59°F | 116 mm | 13 | — |
| May | 27°C / 80°F | 20°C / 67°F | 84 mm | 16 | — |
| June | 29°C / 85°F | 23°C / 74°F | 129 mm | 22 | — |
| July | 31°C / 88°F | 25°C / 77°F | 118 mm | 25 | — |
| August | 30°C / 86°F | 25°C / 76°F | 170 mm | 26 | — |
| September | 28°C / 82°F | 22°C / 72°F | 157 mm | 21 | — |
| October | 24°C / 76°F | 17°C / 63°F | 94 mm | 13 | — |
| November | 19°C / 66°F | 11°C / 52°F | 85 mm | 12 | — |
| December | 17°C / 62°F | 9°C / 49°F | 122 mm | 12 | — |
Other cities with similar August weather
🌍 See the full ranked list of climate twins for Charleston in August →
Frequently asked questions
How hot is Charleston in August?
In August, Charleston averages a high of 30°C (86°F) and a low of 25°C (76°F) — generally hot.
Does it rain a lot in Charleston in August?
August is quite rainy in Charleston, with about 26 rainy days on average.
Is August a good time to visit Charleston?
August is hot but on the rainy side. It suits travelers who are comfortable with hot weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for Charleston in August?
Pack lightweight, breathable clothing, sunglasses and sunscreen, plus a compact umbrella or rain jacket. See the full August packing list for Charleston for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.