UV Index
UV Index
Today's UV index in Charleston, United States 
will be up to 9.1, indicating a very high level of sun exposure for the average person. Check our tips for today to make sure you're safe in the sun.
Last checked: 2025-05-10
With a UV index of 9.1 in Charleston, it's crucial to safeguard your skin from harmful UV rays. Protect yourself by minimizing sun exposure, wearing protective clothing, and applying SPF 30+ sunscreen every 2 hours.
Charleston's UV index can be high, especially in summer, often reaching levels 8 to 10, indicating strong sun exposure. It is lower in winter, usually around 2 to 4. UV levels fluctuate with the seasons.
Charleston has hot, humid summers with temperatures often above 85°F and mild winters that rarely drop below freezing. Rainfall is spread throughout the year but heavier in summer due to thunderstorms and hurricanes. Spring and fall are generally warm and pleasant.
Compared to nearby cities like Savannah, Charleston is slightly more humid and has a longer rainy season. Relative to the wider southeastern U.S., Charleston experiences more tropical storms due to its coastal location. Neighboring states like Georgia and North Carolina have similar seasonal patterns but less humidity.
See the UV index hour by hour for Charleston, along with the temperature and how cloudy it is. If the UV level is higher than moderate, it's best to avoid direct sunlight.