Today | Weather | Saturday, May 16, 2026

Weather in Charleston, South Carolina

08:33 AM
Now
Sunny Weather
66° F
Feels Like 70°
Precipitation 0 %
Wind 6 mph
UV Index (0 - 11+) 3
Humidity 89 %
Today
Sunny Weather
Day 81°
Night 70°
Precipitation 2 %
Wind 8 mph
UV Index (0 - 11+) 11

Warning: Extreme UV Index Today: 11

Overexposure to the sun's harmful UV rays can cause sunburn and increase the risk of developing skin cancer, including melanoma. Protect yourself by wearing clothing that covers your skin, sunglasses, and a hat. Apply a broad-spectrum sunscreen with an SPF of 30 or higher every two hours, even on cloudy days. Minimize direct sun exposure during peak hours (10 AM to 4 PM) to reduce the risk.

Charleston Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (May 16, 2025)
Cloudy Weather

Day

91°

Night

75°

Wind

9 mph

UV Index

11

Precipitation

0 %

Air Quality in Charleston

NOW
69 AQI
Moderate air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 4.57 µg/m³
PM10 10.33 µg/m³
O3 0.060 ppm
NO2 0.3 ppb
SO2 0.2 ppb
CO 0.11 ppm
NH3 0.48 µg/m³
NO 0.05 µg/m³
PM2.5 – Fine particles <2.5μm
PM10 – Inhalable particles <10μm
O3 – Ozone
NO2 – Nitrogen dioxide
SO2 – Sulfur dioxide
CO – Carbon monoxide
NH3 – Ammonia
NO – Nitric oxide

Health Recommendations:

Air quality is acceptable; however, for some pollutants, there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.

Show raw pollutant concentrations (µg/m³)
PM2.54.57 µg/m³
PM1010.33 µg/m³
O3118.13 µg/m³
NO20.58 µg/m³
SO20.57 µg/m³
CO126.02 µg/m³
NH30.48 µg/m³
NO0.05 µg/m³