City in South Carolina, United States
Charleston weather by month and the best time to visit
When to go to Charleston
Mar–May is warm with azaleas; Oct–Nov is mild. Jun–Sep is hot, humid and storm-prone; hurricane season runs Jun–Nov and downtown floods in heavy rain.
Charleston weather by month
Average daily high, rainfall and conditions.
- Jan14°61 mm
- Feb16°84 mm
- Mar20°84 mm
- Apr24°82 mm
- May28°92 mm
- Jun31°140 mm
- Jul32°147 mm
- Aug31°170 mm
- Sep29°119 mm
- Oct25°105 mm
- Nov20°69 mm
- Dec16°91 mm
Monthly averages
| Month | High | Low | Rain | Humidity | Conditions |
|---|---|---|---|---|---|
| January | 14°C57°F | 4°C39°F | 61 mm | 80% | Cool |
| February | 16°C61°F | 6°C42°F | 84 mm | 80% | Cool |
| March | 20°C67°F | 9°C48°F | 84 mm | 78% | Pleasant |
| April | 24°C75°F | 13°C56°F | 82 mm | 75% | Pleasant |
| May | 28°C83°F | 18°C65°F | 92 mm | 73% | Pleasant |
| June | 31°C88°F | 22°C72°F | 140 mm | 76% | Hot & humid |
| July | 32°C90°F | 24°C75°F | 147 mm | 76% | Hot & humid |
| August | 31°C89°F | 23°C74°F | 170 mm | 79% | Rainy |
| September | 29°C84°F | 21°C69°F | 119 mm | 80% | Pleasant |
| October | 25°C77°F | 15°C59°F | 105 mm | 78% | Pleasant |
| November | 20°C67°F | 9°C49°F | 69 mm | 79% | Pleasant |
| December | 16°C61°F | 6°C44°F | 91 mm | 82% | Cool |
Best months across United States
| Place | Best months | Warmest month |
|---|---|---|
| New York City | Apr–Jun, Sep–Oct | Jul (26°C) |
| Las Vegas | Mar–May, Oct–Nov | Jul (42°C) |
| Los Angeles | Mar–May, Sep–Nov | Aug (32°C) |
| Orlando | Feb–Apr, Nov | May (31°C) |
| Miami | Nov–Apr | Aug (30°C) |
| San Francisco | Apr–May, Sep–Oct | Sep (24°C) |
| Honolulu | Apr–Jun, Sep–Oct | Sep (28°C) |
| Washington, D.C. | Mar–May, Sep–Oct | Jul (31°C) |
| Chicago | May–Jun, Sep–Oct | Jul (25°C) |
| Boston | May–Jun, Sep–Oct | Jul (28°C) |
| New Orleans | Feb–Apr, Oct–Nov | Jul (30°C) |
| San Diego | Apr–May, Sep–Nov | Aug (32°C) |
| Seattle | Jun–Sep | Aug (24°C) |
| Maui | Apr–May, Sep–Oct | Sep (22°C) |
| Nashville | Apr–May, Sep–Oct | Aug (32°C) |
| Austin | Mar–May, Oct–Nov | Aug (36°C) |
| Miami Beach | Nov–Apr | Aug (30°C) |
| Key West | Dec–Apr | Aug (30°C) |
| Denver | May–Jun, Sep–Oct | Jul (33°C) |
| Philadelphia | Apr–May, Sep–Oct | Jul (30°C) |
| Portland | Jun–Sep | Aug (29°C) |
| Atlanta | Mar–May, Oct–Nov | Jul (32°C) |
| San Antonio | Mar–May, Oct–Nov | Aug (36°C) |
| Charleston | Mar–May, Oct–Nov | Jul (32°C) |
| Savannah | Mar–May, Oct–Nov | Jul (33°C) |
| Fort Lauderdale | Dec–Apr | Aug (30°C) |
| Kauai | Apr–Jun, Sep–Oct | Sep (27°C) |
| Big Island | Apr–Jun, Sep–Oct | Aug (26°C) |
| Sedona | Mar–May, Sep–Nov | Jul (35°C) |
| Scottsdale | Feb–Apr, Oct–Nov | Jul (42°C) |
Quick answers
What is the best month to visit Charleston?
Mar–May, Oct–Nov. Mar–May is warm with azaleas; Oct–Nov is mild. Jun–Sep is hot, humid and storm-prone; hurricane season runs Jun–Nov and downtown floods in heavy rain.
When is the rainy season in Charleston?
Rain peaks in August with about 170 mm. Months with 150 mm or more: Aug.
What is the hottest month in Charleston?
July, with average highs of 32°C (90°F).
How cold does Charleston get?
The coolest nights are in January, averaging 4°C (39°F).
More about Charleston
Going to Charleston solo?
SoloSquare is where travelers, nomads and locals in Charleston meet up for small plans: coffee, dinners, walks and day trips. Join one, or start your own in a minute.
Sources
Climate averages are modelled from NASA POWER (MERRA-2) for 2001–2020 at about 50 km resolution, so coasts and valleys can differ a little. Compiled and reviewed by SoloSquare. How we compile and score this. Spotted something out of date? Tell us.