Hourly Weather | Today Wednesday, March 18, 2026
Greenville, South Carolina
6 AM
Cloudy Night
34°
Feels Like 30°
0
Humidity: 48%
UV Index: 0
Wind: 5 mph
7 AM
Cloudy Night
30°
Feels Like 28°
0
Humidity: 50%
UV Index: 0
Wind: 6 mph
8 AM
Cloudy Weather
30°
Feels Like 30°
0
Humidity: 56%
UV Index: 1
Wind: 6 mph
9 AM
Cloudy Weather
32°
Feels Like 36°
0
Humidity: 53%
UV Index: 2
Wind: 5 mph
10 AM
Cloudy Weather
36°
Feels Like 41°
0
Humidity: 44%
UV Index: 3
Wind: 5 mph
11 AM
Cloudy Weather
39°
Feels Like 46°
0
Humidity: 38%
UV Index: 4
Wind: 5 mph
12 PM
Cloudy Weather
43°
Feels Like 52°
0
Humidity: 34%
UV Index: 5
Wind: 6 mph
1 PM
Cloudy Weather
45°
Feels Like 54°
0
Humidity: 31%
UV Index: 6
Wind: 6 mph
2 PM
Cloudy Weather
46°
Feels Like 54°
0
Humidity: 30%
UV Index: 5
Wind: 7 mph
3 PM
Cloudy Weather
48°
Feels Like 54°
0
Humidity: 29%
UV Index: 4
Wind: 7 mph
4 PM
Cloudy Weather
50°
Feels Like 52°
0
Humidity: 28%
UV Index: 3
Wind: 7 mph
5 PM
Cloudy Weather
48°
Feels Like 48°
0
Humidity: 31%
UV Index: 2
Wind: 7 mph
6 PM
Cloudy Weather
48°
Feels Like 46°
0
Humidity: 32%
UV Index: 1
Wind: 7 mph
7 PM
Cloudy Weather
48°
Feels Like 45°
0
Humidity: 36%
UV Index: 0
Wind: 7 mph
8 PM
Cloudy Night
46°
Feels Like 45°
0
Humidity: 41%
UV Index: 0
Wind: 6 mph
9 PM
Cloudy Night
45°
Feels Like 43°
0
Humidity: 45%
UV Index: 0
Wind: 6 mph
10 PM
Cloudy Night
43°
Feels Like 41°
0
Humidity: 51%
UV Index: 0
Wind: 5 mph
11 PM
Cloudy Night
39°
Feels Like 39°
0
Humidity: 55%
UV Index: 0
Wind: 5 mph

Hourly Air Quality Forecast - AQI (US EPA)

6 AM
38 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.22 µg/m³
  • PM10: 11.22 µg/m³
  • O3: 0.041 ppm
  • NO2: 1.4 ppb
  • SO2: 0.2 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

7 AM
37 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.35 µg/m³
  • PM10: 11.35 µg/m³
  • O3: 0.040 ppm
  • NO2: 1.5 ppb
  • SO2: 0.2 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

8 AM
37 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.53 µg/m³
  • PM10: 11.41 µg/m³
  • O3: 0.040 ppm
  • NO2: 1.8 ppb
  • SO2: 0.2 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

9 AM
37 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.66 µg/m³
  • PM10: 10.86 µg/m³
  • O3: 0.040 ppm
  • NO2: 2.6 ppb
  • SO2: 0.3 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

10 AM
37 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.64 µg/m³
  • PM10: 9.82 µg/m³
  • O3: 0.040 ppm
  • NO2: 2.9 ppb
  • SO2: 0.3 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

11 AM
39 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.67 µg/m³
  • PM10: 8.49 µg/m³
  • O3: 0.042 ppm
  • NO2: 2.5 ppb
  • SO2: 0.4 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

12 PM
47 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.46 µg/m³
  • PM10: 5.7 µg/m³
  • O3: 0.051 ppm
  • NO2: 1.5 ppb
  • SO2: 0.5 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

1 PM
52 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.54 µg/m³
  • PM10: 5.22 µg/m³
  • O3: 0.055 ppm
  • NO2: 1 ppb
  • SO2: 0.5 ppb
  • CO: 0.14 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

2 PM
58 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.85 µg/m³
  • PM10: 5.41 µg/m³
  • O3: 0.056 ppm
  • NO2: 0.7 ppb
  • SO2: 0.5 ppb
  • CO: 0.13 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

3 PM
67 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.01 µg/m³
  • PM10: 5.53 µg/m³
  • O3: 0.059 ppm
  • NO2: 0.5 ppb
  • SO2: 0.4 ppb
  • CO: 0.13 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

4 PM
71 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.93 µg/m³
  • PM10: 5.44 µg/m³
  • O3: 0.061 ppm
  • NO2: 0.4 ppb
  • SO2: 0.4 ppb
  • CO: 0.13 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

5 PM
73 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.67 µg/m³
  • PM10: 5.19 µg/m³
  • O3: 0.061 ppm
  • NO2: 0.4 ppb
  • SO2: 0.3 ppb
  • CO: 0.13 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

6 PM
57 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.48 µg/m³
  • PM10: 6.05 µg/m³
  • O3: 0.056 ppm
  • NO2: 1 ppb
  • SO2: 0.3 ppb
  • CO: 0.13 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

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

Pollutant Concentrations:

  • PM2.5: 3.66 µg/m³
  • PM10: 8.04 µg/m³
  • O3: 0.048 ppm
  • NO2: 2.4 ppb
  • SO2: 0.2 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.82 µg/m³
  • PM10: 9.8 µg/m³
  • O3: 0.042 ppm
  • NO2: 3.5 ppb
  • SO2: 0.1 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4 µg/m³
  • PM10: 11.35 µg/m³
  • O3: 0.038 ppm
  • NO2: 3.9 ppb
  • SO2: 0.1 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.16 µg/m³
  • PM10: 12.65 µg/m³
  • O3: 0.035 ppm
  • NO2: 4.2 ppb
  • SO2: 0.1 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.31 µg/m³
  • PM10: 13.53 µg/m³
  • O3: 0.033 ppm
  • NO2: 4.3 ppb
  • SO2: 0.1 ppb
  • CO: 0.17 ppm

Health Recommendations:

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