Hourly Weather | Today Monday, September 21, 2026
Johnson City, Tennessee
4 PM
Sunny with a Chance of Thunderstorms
86°
Feels Like 90°
72
Humidity: 56%
UV Index: 3
Wind: 6 mph
5 PM
Cloudy Weather
84°
Feels Like 88°
47
Humidity: 58%
UV Index: 2
Wind: 6 mph
6 PM
Sunny with a Chance of Thunderstorms
82°
Feels Like 82°
55
Humidity: 71%
UV Index: 0
Wind: 6 mph
7 PM
Cloudy Weather
79°
Feels Like 84°
49
Humidity: 78%
UV Index: 0
Wind: 5 mph
8 PM
Cloudy Night
77°
Feels Like 79°
47
Humidity: 74%
UV Index: 0
Wind: 6 mph
9 PM
Stormy Weather
73°
Feels Like 73°
51
Humidity: 81%
UV Index: 0
Wind: 6 mph
10 PM
Cloudy Night
72°
Feels Like 73°
47
Humidity: 86%
UV Index: 0
Wind: 5 mph
11 PM
Cloudy Night
70°
Feels Like 70°
32
Humidity: 91%
UV Index: 0
Wind: 5 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 2.95 µg/m³
  • PM10: 3.28 µg/m³
  • O3: 0.039 ppm
  • NO2: 1.4 ppb
  • SO2: 0.2 ppb
  • CO: 0.12 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.04 µg/m³
  • PM10: 3.4 µg/m³
  • O3: 0.038 ppm
  • NO2: 2.3 ppb
  • SO2: 0.2 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.05 µg/m³
  • PM10: 3.53 µg/m³
  • O3: 0.033 ppm
  • NO2: 3.5 ppb
  • SO2: 0.2 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.07 µg/m³
  • PM10: 3.73 µg/m³
  • O3: 0.027 ppm
  • NO2: 4.8 ppb
  • SO2: 0.3 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.05 µg/m³
  • PM10: 3.87 µg/m³
  • O3: 0.024 ppm
  • NO2: 5.3 ppb
  • SO2: 0.3 ppb
  • CO: 0.17 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: 2.99 µg/m³
  • PM10: 3.94 µg/m³
  • O3: 0.022 ppm
  • NO2: 5.3 ppb
  • SO2: 0.3 ppb
  • CO: 0.17 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: O3
Details

Pollutant Concentrations:

  • PM2.5: 2.92 µg/m³
  • PM10: 3.96 µg/m³
  • O3: 0.020 ppm
  • NO2: 5 ppb
  • SO2: 0.3 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.82 µg/m³
  • PM10: 3.88 µg/m³
  • O3: 0.018 ppm
  • NO2: 4.5 ppb
  • SO2: 0.3 ppb
  • CO: 0.17 ppm

Health Recommendations:

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