Charleston (SC) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Charleston.
Climate overview of Charleston
The weather in Charleston, South Carolina, United States of America, can vary greatly throughout the year, with temperatures shifting from very warm in the summer to mild in the cooler months. The city is also known for its heavy rainfall, especially during the late summer and early fall. Charleston is famed for its historic charm, cobblestone streets, and well-preserved architecture. Many people consider it a favorite destination for culture, food, and coastal scenery. Now, let’s explore all the climate details to give you a complete picture.
Charleston Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Charleston - and find the best time to visit.
Monthly Temperature in Charleston
Depending on the time of the year, temperatures range from very warm to moderate in Charleston. Typically, average maximum daytime temperatures range from a very warm 32°C (90°F) in July to a moderate 15°C (59°F) in the coolest month, January.
Nights vary from 24°C (75°F) in July to around 5°C (41°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Charleston
Charleston has a relatively rainy climate with high precipitation levels, averaging 1298 mm (51 in) of rainfall annually. The climate in Charleston shows significant variation throughout the year. Expect heavy rainfall in August, the wettest month, with an average of 185 mm (7.3 in) of precipitation over 17 rainy days.
In contrast, the driest month January offers drier and sunnier days, with around 70 mm (2.8 in) of rainfall over 10 rainy days. For more details, please visit our Charleston Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Charleston
For those who appreciate different seasons, Charleston serves as an ideal destination. Expect longer, more sun-filled days in May with an average of 9.8 hours of sunshine daily, and embrace the darker days in December, offering only 5.7 hours of daily sunlight.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Charleston by Month
The relative humidity is high throughout the year in Charleston.
The city experiences its highest humidity in August, reaching 79%. In February, the humidity drops to its lowest level at 67%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Charleston
Each month is rated for comfortable sightseeing weather — mild temperatures and low rainfall. Tap a month for its full averages; your ideal time may differ for a beach or winter trip (see below).
- Best overall: April and May
- Warmest weather: June, July and August
- Most sunshine: May and July
- Climate seasons: very warm summers and mild winters
Frequently asked questions about the climate in Charleston
What is the best time to visit Charleston?
April and May typically offer the most optimal weather in Charleston. In contrast, August tends to have less optimal conditions. Charleston has very warm summers and mild winters.
What temperatures can I expect in Charleston?
Daytime highs range from 15°C (59°F) in January to 32°C (90°F) in July. Nighttime lows range from 5°C (41°F) to 24°C (75°F). Temperatures vary considerably through the year.
How much rain does Charleston get?
Annual rainfall is around 1298 mm (51 in). August is the wettest month with 185 mm (7.3 in), while January is the driest with 70 mm (2.8 in).
How sunny is Charleston?
Charleston receives around 2,810 hours of sunshine per year. May is the sunniest month with 295 hours, while December is the cloudiest with just 170 hours. Overall, Charleston enjoys abundant sunshine.
Charleston 3-Day Forecast
Charleston (SC) 3-Day Forecast
Charleston on the map
Charleston is highlighted - select any city to see its climate.
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