Charleston, USA

Charleston sits in an ocean-tempered climate in USA, and the 2015–2024 weather record gives its sunshine a clear shape: the May peak reaches a 92/100 sun score, with daytime highs around 27°C — a solid base for a city break.

The year runs from average lows of 6°C in January to highs of 31°C in July. On the rain ledger, October is the safest bet at a 23% chance of a wet day, while August climbs to 64%. If 24°C is your bar for proper warmth, count on May–October.

Season by season (on the northern calendar), spring brings 23°C highs with 29% rain-day odds, summer 30°C at 58%, autumn 24°C at 29%, and winter 16°C at 29%. That makes summer the statistical sweet spot (season score 88), with spring a workable second; winter is where the odds thin out. For warmth without the densest crowds, the shoulder play is May: still 27°C highs, with a sun score of 92.

Best months to visit Charleston

The best month on record is May — a 92/100 sun score, built on 55% cloud cover and 38% rain-day odds — followed by July and April. The dependable window is wider than the podium, though: March–November all score 70 or better. The month to avoid on pure weather odds is January (56/100).

Among the ocean destinations in our catalog, its May rain odds beat 16% of the field.

Month-by-month breakdown for Charleston → · More destinations for May →

Right now the 15-day outlook shows 5 mostly-clear days (under 40% cloud) and none with real rain risk, with temperatures between 10°C and 26°C — which is how Charleston earns its current 87/100 sun score.