Hourly Weather | Today Monday, September 21, 2026
Mount Pleasant, South Carolina
3 PM
Cloudy Weather
88°
Feels Like 97°
6
Humidity: 61%
UV Index: 4
Wind: 8 mph
4 PM
Cloudy Weather
86°
Feels Like 97°
6
Humidity: 67%
UV Index: 3
Wind: 8 mph
5 PM
Cloudy Weather
84°
Feels Like 93°
6
Humidity: 69%
UV Index: 2
Wind: 8 mph
6 PM
Cloudy Weather
84°
Feels Like 91°
6
Humidity: 72%
UV Index: 1
Wind: 8 mph
7 PM
Cloudy Weather
82°
Feels Like 90°
6
Humidity: 77%
UV Index: 0
Wind: 7 mph
8 PM
Cloudy Weather
79°
Feels Like 88°
5
Humidity: 86%
UV Index: 0
Wind: 6 mph
9 PM
Cloudy Weather
77°
Feels Like 84°
5
Humidity: 92%
UV Index: 0
Wind: 6 mph
10 PM
Cloudy Weather
77°
Feels Like 84°
5
Humidity: 93%
UV Index: 0
Wind: 6 mph
11 PM
Cloudy Weather
79°
Feels Like 86°
6
Humidity: 92%
UV Index: 0
Wind: 6 mph

Hourly Air Quality Forecast - AQI (US EPA)

3 PM
36 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.49 µg/m³
  • PM10: 3.35 µg/m³
  • O3: 0.039 ppm
  • NO2: 0.3 ppb
  • SO2: 0.1 ppb
  • CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

4 PM
34 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 1.17 µg/m³
  • PM10: 2.79 µg/m³
  • O3: 0.037 ppm
  • NO2: 0.2 ppb
  • SO2: 0.1 ppb
  • CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

5 PM
33 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.92 µg/m³
  • PM10: 2.38 µg/m³
  • O3: 0.035 ppm
  • NO2: 0.2 ppb
  • SO2: 0.1 ppb
  • CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

6 PM
31 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.75 µg/m³
  • PM10: 2.13 µg/m³
  • O3: 0.034 ppm
  • NO2: 0.2 ppb
  • SO2: 0.1 ppb
  • CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

7 PM
31 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.69 µg/m³
  • PM10: 2.12 µg/m³
  • O3: 0.033 ppm
  • NO2: 0.2 ppb
  • SO2: 0.1 ppb
  • CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

8 PM
31 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.66 µg/m³
  • PM10: 2.09 µg/m³
  • O3: 0.033 ppm
  • NO2: 0.2 ppb
  • SO2: 0.1 ppb
  • CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

9 PM
31 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.61 µg/m³
  • PM10: 1.92 µg/m³
  • O3: 0.033 ppm
  • NO2: 0.2 ppb
  • SO2: 0.1 ppb
  • CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

10 PM
30 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.56 µg/m³
  • PM10: 1.63 µg/m³
  • O3: 0.033 ppm
  • NO2: 0.2 ppb
  • SO2: 0.1 ppb
  • CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

11 PM
30 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 0.52 µg/m³
  • PM10: 1.34 µg/m³
  • O3: 0.032 ppm
  • NO2: 0.2 ppb
  • SO2: 0.1 ppb
  • CO: 0.10 ppm

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.