Hourly Weather | Today Wednesday, March 18, 2026
Johnson City, Tennessee
7 AM
Cloudy Weather
23°
Feels Like 25°
1
Humidity: 57%
UV Index: 0
Wind: 4 mph
8 AM
Cloudy Weather
19°
Feels Like 19°
0
Frost Risk: 99%
Humidity: 70%
UV Index: 0
Wind: 5 mph
9 AM
Cloudy Weather
23°
Feels Like 25°
0
Humidity: 62%
UV Index: 1
Wind: 5 mph
10 AM
Cloudy Weather
28°
Feels Like 32°
0
Humidity: 48%
UV Index: 1
Wind: 5 mph
11 AM
Cloudy Weather
34°
Feels Like 39°
0
Humidity: 38%
UV Index: 2
Wind: 5 mph
12 PM
Cloudy Weather
39°
Feels Like 43°
0
Humidity: 32%
UV Index: 2
Wind: 6 mph
1 PM
Cloudy Weather
43°
Feels Like 41°
2
Humidity: 30%
UV Index: 2
Wind: 7 mph
2 PM
Cloudy Weather
43°
Feels Like 41°
6
Humidity: 31%
UV Index: 2
Wind: 7 mph
3 PM
Cloudy Weather
45°
Feels Like 43°
6
Humidity: 33%
UV Index: 1
Wind: 7 mph
4 PM
Cloudy Weather
45°
Feels Like 43°
6
Humidity: 36%
UV Index: 1
Wind: 7 mph
5 PM
Cloudy Weather
45°
Feels Like 43°
6
Humidity: 42%
UV Index: 1
Wind: 7 mph
6 PM
Cloudy Weather
45°
Feels Like 43°
6
Humidity: 44%
UV Index: 0
Wind: 6 mph
7 PM
Cloudy Weather
43°
Feels Like 41°
5
Humidity: 48%
UV Index: 0
Wind: 5 mph
8 PM
Cloudy Weather
39°
Feels Like 39°
2
Humidity: 54%
UV Index: 0
Wind: 5 mph
9 PM
Cloudy Weather
39°
Feels Like 37°
2
Humidity: 57%
UV Index: 0
Wind: 5 mph
10 PM
Cloudy Weather
36°
Feels Like 34°
2
Humidity: 63%
UV Index: 0
Wind: 6 mph
11 PM
Cloudy Weather
34°
Feels Like 28°
2
Humidity: 69%
UV Index: 0
Wind: 7 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 2.4 µg/m³
  • PM10: 3.61 µg/m³
  • O3: 0.047 ppm
  • NO2: 1.5 ppb
  • SO2: 0.4 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.46 µg/m³
  • PM10: 3.78 µg/m³
  • O3: 0.047 ppm
  • NO2: 2 ppb
  • SO2: 0.4 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.59 µg/m³
  • PM10: 3.93 µg/m³
  • O3: 0.046 ppm
  • NO2: 2.8 ppb
  • SO2: 0.5 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.71 µg/m³
  • PM10: 4.01 µg/m³
  • O3: 0.046 ppm
  • NO2: 2.9 ppb
  • SO2: 0.5 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.92 µg/m³
  • PM10: 4.18 µg/m³
  • O3: 0.046 ppm
  • NO2: 2.4 ppb
  • SO2: 0.5 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.8 µg/m³
  • PM10: 3.7 µg/m³
  • O3: 0.053 ppm
  • NO2: 1.3 ppb
  • SO2: 0.6 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3 µg/m³
  • PM10: 3.79 µg/m³
  • O3: 0.055 ppm
  • NO2: 0.9 ppb
  • SO2: 0.6 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.

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

Pollutant Concentrations:

  • PM2.5: 3.34 µg/m³
  • PM10: 4.13 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
65 AQI
Moderate air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 3.6 µg/m³
  • PM10: 4.42 µg/m³
  • O3: 0.059 ppm
  • NO2: 0.5 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.

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

Pollutant Concentrations:

  • PM2.5: 3.68 µg/m³
  • PM10: 4.53 µg/m³
  • O3: 0.060 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.

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

Pollutant Concentrations:

  • PM2.5: 3.77 µg/m³
  • PM10: 4.68 µg/m³
  • O3: 0.060 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.

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

Pollutant Concentrations:

  • PM2.5: 3.83 µg/m³
  • PM10: 4.96 µg/m³
  • O3: 0.057 ppm
  • NO2: 1.1 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
49 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.02 µg/m³
  • PM10: 5.62 µg/m³
  • O3: 0.053 ppm
  • NO2: 2.2 ppb
  • SO2: 0.3 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.36 µg/m³
  • PM10: 6.53 µg/m³
  • O3: 0.050 ppm
  • NO2: 3.1 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 PM
43 AQI
Good air quality Dominant pollutant: O3
Details

Pollutant Concentrations:

  • PM2.5: 4.81 µg/m³
  • PM10: 7.54 µg/m³
  • O3: 0.047 ppm
  • NO2: 3.5 ppb
  • SO2: 0.2 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.27 µg/m³
  • PM10: 8.49 µg/m³
  • O3: 0.044 ppm
  • NO2: 3.9 ppb
  • SO2: 0.2 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.65 µg/m³
  • PM10: 9.25 µg/m³
  • O3: 0.042 ppm
  • NO2: 4 ppb
  • SO2: 0.2 ppb
  • CO: 0.18 ppm

Health Recommendations:

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