Hourly Weather | Today Wednesday, May 20, 2026
Louisville, Kentucky
1 AM
Cloudy Night
61°
Feels Like 59°
49
Humidity: 91%
UV Index: 0
Wind: 7 mph
2 AM
Cloudy Weather
61°
Feels Like 57°
34
Humidity: 92%
UV Index: 0
Wind: 7 mph
3 AM
Cloudy Weather
61°
Feels Like 57°
34
Humidity: 91%
UV Index: 0
Wind: 7 mph
4 AM
Cloudy Weather
59°
Feels Like 55°
39
Humidity: 91%
UV Index: 0
Wind: 7 mph
5 AM
Cloudy Weather
57°
Feels Like 55°
49
Humidity: 90%
UV Index: 0
Wind: 7 mph
6 AM
Stormy Weather
57°
Feels Like 52°
64
Humidity: 90%
UV Index: 0
Wind: 8 mph
7 AM
Stormy Weather
55°
Feels Like 52°
59
Humidity: 91%
UV Index: 0
Wind: 8 mph
8 AM
Cloudy Weather
55°
Feels Like 54°
25
Humidity: 92%
UV Index: 1
Wind: 8 mph
9 AM
Cloudy Weather
57°
Feels Like 55°
20
Humidity: 87%
UV Index: 1
Wind: 8 mph
10 AM
Cloudy Weather
57°
Feels Like 57°
20
Humidity: 81%
UV Index: 1
Wind: 8 mph
11 AM
Cloudy Weather
61°
Feels Like 61°
20
Humidity: 77%
UV Index: 2
Wind: 9 mph
12 PM
Cloudy Weather
63°
Feels Like 63°
20
Humidity: 72%
UV Index: 3
Wind: 9 mph
1 PM
Cloudy Weather
64°
Feels Like 66°
16
Humidity: 67%
UV Index: 3
Wind: 9 mph
2 PM
Cloudy Weather
66°
Feels Like 68°
7
Humidity: 63%
UV Index: 3
Wind: 8 mph
3 PM
Cloudy Weather
70°
Feels Like 70°
7
Humidity: 60%
UV Index: 2
Wind: 8 mph
4 PM
Cloudy Weather
72°
Feels Like 70°
7
Humidity: 58%
UV Index: 1
Wind: 8 mph
5 PM
Cloudy Weather
73°
Feels Like 72°
7
Humidity: 56%
UV Index: 1
Wind: 8 mph
6 PM
Cloudy Weather
72°
Feels Like 70°
7
Humidity: 60%
UV Index: 1
Wind: 8 mph
7 PM
Cloudy Weather
70°
Feels Like 68°
7
Humidity: 63%
UV Index: 0
Wind: 7 mph
8 PM
Cloudy Weather
68°
Feels Like 66°
7
Humidity: 67%
UV Index: 0
Wind: 7 mph
9 PM
Cloudy Weather
66°
Feels Like 64°
7
Humidity: 71%
UV Index: 0
Wind: 6 mph
10 PM
Cloudy Weather
64°
Feels Like 63°
7
Humidity: 73%
UV Index: 0
Wind: 6 mph
11 PM
Cloudy Weather
64°
Feels Like 63°
7
Humidity: 77%
UV Index: 0
Wind: 6 mph

Hourly Air Quality Forecast - AQI (US EPA)

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

Pollutant Concentrations:

  • PM2.5: 1.43 µg/m³
  • PM10: 1.93 µg/m³
  • O3: 0.007 ppm
  • NO2: 2 ppb
  • SO2: 0.1 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

2 AM
6 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 1.48 µg/m³
  • PM10: 2.05 µg/m³
  • O3: 0.005 ppm
  • NO2: 1.7 ppb
  • SO2: 0.1 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

3 AM
6 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 1.53 µg/m³
  • PM10: 2.17 µg/m³
  • O3: 0.004 ppm
  • NO2: 1.5 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 AM
7 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 1.58 µg/m³
  • PM10: 2.3 µg/m³
  • O3: 0.004 ppm
  • NO2: 1.3 ppb
  • SO2: 0 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

5 AM
7 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 1.63 µg/m³
  • PM10: 2.43 µg/m³
  • O3: 0.003 ppm
  • NO2: 1.3 ppb
  • SO2: 0.1 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

6 AM
7 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 1.65 µg/m³
  • PM10: 2.44 µg/m³
  • O3: 0.003 ppm
  • NO2: 1.3 ppb
  • SO2: 0.2 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

7 AM
7 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 1.68 µg/m³
  • PM10: 2.33 µg/m³
  • O3: 0.002 ppm
  • NO2: 1.3 ppb
  • SO2: 0.3 ppb
  • CO: 0.09 ppm

Health Recommendations:

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

8 AM
7 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 1.76 µg/m³
  • PM10: 2.31 µg/m³
  • O3: 0.002 ppm
  • NO2: 1.6 ppb
  • SO2: 0.4 ppb
  • CO: 0.10 ppm

Health Recommendations:

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

9 AM
8 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 2.04 µg/m³
  • PM10: 2.44 µg/m³
  • O3: 0.006 ppm
  • NO2: 2.1 ppb
  • SO2: 0.5 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

10 AM
9 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 2.26 µg/m³
  • PM10: 2.61 µg/m³
  • O3: 0.007 ppm
  • NO2: 2.1 ppb
  • SO2: 0.4 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

11 AM
10 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 2.43 µg/m³
  • PM10: 2.78 µg/m³
  • O3: 0.007 ppm
  • NO2: 1.9 ppb
  • SO2: 0.4 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 2.7 µg/m³
  • PM10: 3.05 µg/m³
  • O3: 0.010 ppm
  • NO2: 1.6 ppb
  • SO2: 0.5 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

1 PM
13 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 3.12 µg/m³
  • PM10: 3.46 µg/m³
  • O3: 0.013 ppm
  • NO2: 1.4 ppb
  • SO2: 0.5 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

2 PM
16 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 3.84 µg/m³
  • PM10: 4.17 µg/m³
  • O3: 0.017 ppm
  • NO2: 1.1 ppb
  • SO2: 0.6 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.66 µg/m³
  • PM10: 4.97 µg/m³
  • O3: 0.019 ppm
  • NO2: 1.1 ppb
  • SO2: 0.6 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

4 PM
21 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 5.14 µg/m³
  • PM10: 5.45 µg/m³
  • O3: 0.018 ppm
  • NO2: 1.2 ppb
  • SO2: 0.6 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.47 µg/m³
  • PM10: 5.77 µg/m³
  • O3: 0.016 ppm
  • NO2: 1.4 ppb
  • SO2: 0.7 ppb
  • CO: 0.11 ppm

Health Recommendations:

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

6 PM
24 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 5.78 µg/m³
  • PM10: 6.08 µg/m³
  • O3: 0.013 ppm
  • NO2: 1.8 ppb
  • SO2: 0.7 ppb
  • CO: 0.12 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: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 6.07 µg/m³
  • PM10: 6.35 µg/m³
  • O3: 0.011 ppm
  • NO2: 2.2 ppb
  • SO2: 0.7 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: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 6.1 µg/m³
  • PM10: 6.33 µg/m³
  • O3: 0.010 ppm
  • NO2: 2.4 ppb
  • SO2: 0.6 ppb
  • CO: 0.13 ppm

Health Recommendations:

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

9 PM
24 AQI
Good air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 5.79 µg/m³
  • PM10: 5.97 µg/m³
  • O3: 0.009 ppm
  • NO2: 2.4 ppb
  • SO2: 0.4 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.37 µg/m³
  • PM10: 5.53 µg/m³
  • O3: 0.009 ppm
  • NO2: 2.5 ppb
  • SO2: 0.3 ppb
  • CO: 0.14 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.01 µg/m³
  • PM10: 5.15 µg/m³
  • O3: 0.010 ppm
  • NO2: 2.7 ppb
  • SO2: 0.3 ppb
  • CO: 0.14 ppm

Health Recommendations:

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