United States · 30-year monthly climate averages
Based on 30 years of climate data, the most comfortable months to visit Charleston are March, April and November, when daytime temperatures are agreeable and rainfall is relatively low.
Charleston sees its warmest weather in July, when daytime highs average around 33°C, and its coolest in January (around 16°C).
Annual precipitation totals roughly 1334mm — August is typically the wettest month (~177mm) and November the driest (~68mm).
A distinctly wetter period runs from June to October — worth planning around if you prefer dry days.
🟧 avg daytime high · 🟦 dashed: avg nighttime low · bars: monthly rainfall
Daily forecast highs vs the 30-year normal — last 61 days
Each bar is one day: orange above normal, blue below.
| Month | High / Low | Rainfall | Travel rating |
|---|---|---|---|
| January | 16° / 4°C | 86mm | 👍 Good |
| February | 18° / 5°C | 77mm | 👍 Good |
| March | 21° / 9°C | 85mm | 🌟 Great |
| April | 25° / 13°C | 84mm | 🌟 Great |
| May | 29° / 17°C | 84mm | 👍 Good |
| June | 31° / 21°C | 158mm | 🤔 Fair |
| July | 33° / 23°C | 168mm | ⚠️ Challenging |
| August | 32° / 23°C | 177mm | ⚠️ Challenging |
| September | 30° / 20°C | 153mm | 🤔 Fair |
| October | 26° / 14°C | 110mm | 👍 Good |
| November | 21° / 8°C | 68mm | 🌟 Great |
| December | 17° / 5°C | 85mm | 👍 Good |
January in Charleston is mild, with average daytime highs around 16°C (60°F) and nighttime lows near 4°C (39°F). Expect roughly 86mm of precipitation spread over about 7 rainy days, with a moderate amount of rain.
🎒 What to pack — light jacket · layers for cool evenings
February in Charleston is mild, with average daytime highs around 18°C (64°F) and nighttime lows near 5°C (42°F). Expect roughly 77mm of precipitation spread over about 7 rainy days, with a moderate amount of rain.
🎒 What to pack — light jacket · layers for cool evenings
March in Charleston is pleasantly warm, with average daytime highs around 21°C (70°F) and nighttime lows near 9°C (47°F). Expect roughly 85mm of precipitation spread over about 7 rainy days, with a moderate amount of rain.
🎒 What to pack — light layers · comfortable walking shoes
April in Charleston is warm, with average daytime highs around 25°C (77°F) and nighttime lows near 13°C (55°F). Expect roughly 84mm of precipitation spread over about 6 rainy days, with a moderate amount of rain.
🎒 What to pack — light summer clothing · sunscreen and sunglasses
May in Charleston is warm, with average daytime highs around 29°C (84°F) and nighttime lows near 17°C (63°F). Expect roughly 84mm of precipitation spread over about 6 rainy days, with a moderate amount of rain.
🎒 What to pack — light summer clothing · sunscreen and sunglasses
June in Charleston is hot, with average daytime highs around 31°C (89°F) and nighttime lows near 21°C (70°F). Expect roughly 158mm of precipitation spread over about 10 rainy days, and this is one of the wetter months.
🎒 What to pack — breathable summer clothing · sunscreen, hat and sunglasses · refillable water bottle · compact umbrella or rain jacket
July in Charleston is hot, with average daytime highs around 33°C (91°F) and nighttime lows near 23°C (74°F). Expect roughly 168mm of precipitation spread over about 11 rainy days, and this is one of the wetter months.
🎒 What to pack — breathable summer clothing · sunscreen, hat and sunglasses · refillable water bottle · compact umbrella or rain jacket
August in Charleston is hot, with average daytime highs around 32°C (90°F) and nighttime lows near 23°C (73°F). Expect roughly 177mm of precipitation spread over about 11 rainy days, and this is one of the wetter months.
🎒 What to pack — breathable summer clothing · sunscreen, hat and sunglasses · refillable water bottle · compact umbrella or rain jacket
September in Charleston is warm, with average daytime highs around 30°C (85°F) and nighttime lows near 20°C (68°F). Expect roughly 153mm of precipitation spread over about 8 rainy days, and this is one of the wetter months.
🎒 What to pack — light summer clothing · sunscreen and sunglasses · compact umbrella or rain jacket
October in Charleston is warm, with average daytime highs around 26°C (78°F) and nighttime lows near 14°C (58°F). Expect roughly 110mm of precipitation spread over about 6 rainy days, and this is one of the wetter months.
🎒 What to pack — light summer clothing · sunscreen and sunglasses · compact umbrella or rain jacket
November in Charleston is pleasantly warm, with average daytime highs around 21°C (69°F) and nighttime lows near 8°C (47°F). Expect roughly 68mm of precipitation spread over about 5 rainy days, with a moderate amount of rain.
🎒 What to pack — light layers · comfortable walking shoes
December in Charleston is mild, with average daytime highs around 17°C (63°F) and nighttime lows near 5°C (42°F). Expect roughly 85mm of precipitation spread over about 7 rainy days, with a moderate amount of rain.
🎒 What to pack — light jacket · layers for cool evenings