Today | Weather | Tuesday, July 21, 2026

Weather in North Charleston, South Carolina

05:22 AM
Now
Cloudy Night
79° F
Feels Like 90°
Precipitation 28 %
Wind 7 mph
Humidity 95 %
Today
Sunny with a Chance of Thunderstorms
Day 97°
Night 81°
Precipitation 55 %
Wind 13 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.

North Charleston Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (July 21, 2025)
Rainy Weather

Day

97°

Night

77°

Wind

5 mph

Precipitation

94 %

Air Quality in North Charleston

NOW
31 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 3.74 µg/m³
PM10 12.41 µg/m³
O3 0.034 ppm
NO2 0.3 ppb
SO2 0.2 ppb
CO 0.08 ppm
NH3 0 µg/m³
NO 0 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 considered satisfactory, and air pollution poses little or no risk.

Show raw pollutant concentrations (µg/m³)
PM2.53.74 µg/m³
PM1012.41 µg/m³
O366.24 µg/m³
NO20.63 µg/m³
SO20.42 µg/m³
CO92.43 µg/m³
NH30 µg/m³
NO0 µg/m³