Hourly Weather | Today Monday, September 21, 2026
Greenville, South Carolina
3 PM
Cloudy Weather
91°
Feels Like 99°
20
Humidity: 48%
UV Index: 4
Wind: 7 mph
4 PM
Cloudy Weather
90°
Feels Like 95°
25
Humidity: 51%
UV Index: 2
Wind: 7 mph
5 PM
Sunny with a Chance of Thunderstorms
86°
Feels Like 90°
51
Humidity: 67%
UV Index: 1
Wind: 7 mph
6 PM
Cloudy Weather
82°
Feels Like 90°
47
Humidity: 71%
UV Index: 1
Wind: 6 mph
7 PM
Cloudy Weather
81°
Feels Like 84°
47
Humidity: 69%
UV Index: 0
Wind: 6 mph
8 PM
Stormy Weather
79°
Feels Like 79°
51
Humidity: 77%
UV Index: 0
Wind: 6 mph
9 PM
Cloudy Night
75°
Feels Like 79°
47
Humidity: 84%
UV Index: 0
Wind: 5 mph
10 PM
Cloudy Night
73°
Feels Like 75°
40
Humidity: 89%
UV Index: 0
Wind: 5 mph
11 PM
Cloudy Weather
72°
Feels Like 73°
34
Humidity: 94%
UV Index: 0
Wind: 5 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 3.7 µg/m³
  • PM10: 4.67 µg/m³
  • O3: 0.047 ppm
  • NO2: 0.3 ppb
  • SO2: 0 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.76 µg/m³
  • PM10: 5.05 µg/m³
  • O3: 0.046 ppm
  • NO2: 0.4 ppb
  • SO2: 0 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.79 µg/m³
  • PM10: 5.37 µg/m³
  • O3: 0.046 ppm
  • NO2: 0.6 ppb
  • SO2: 0 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.91 µg/m³
  • PM10: 5.98 µg/m³
  • O3: 0.042 ppm
  • NO2: 1.2 ppb
  • SO2: 0 ppb
  • CO: 0.13 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: 4.11 µg/m³
  • PM10: 6.76 µg/m³
  • O3: 0.034 ppm
  • NO2: 1.9 ppb
  • SO2: 0.1 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.3 µg/m³
  • PM10: 7.31 µg/m³
  • O3: 0.028 ppm
  • NO2: 2 ppb
  • SO2: 0.1 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.34 µg/m³
  • PM10: 7.65 µg/m³
  • O3: 0.022 ppm
  • NO2: 1.9 ppb
  • SO2: 0 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

10 PM
18 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 4.43 µg/m³
  • PM10: 8.3 µg/m³
  • O3: 0.018 ppm
  • NO2: 1.8 ppb
  • SO2: 0 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

11 PM
19 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 4.47 µg/m³
  • PM10: 8.97 µg/m³
  • O3: 0.016 ppm
  • NO2: 1.8 ppb
  • SO2: 0 ppb
  • CO: 0.13 ppm

Health Recommendations:

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