Hourly Weather | Today Sunday, September 21, 2025
Louisville, Kentucky
10 AM
Cloudy Weather
73°
Feels Like 79°
6
Humidity: 75%
Wind: 5 mph
UV Index: 30
11 AM
Cloudy Weather
79°
Feels Like 84°
5
Humidity: 67%
Wind: 6 mph
UV Index: 41
12 PM
Cloudy Weather
81°
Feels Like 88°
5
Humidity: 60%
Wind: 7 mph
UV Index: 49
1 PM
Cloudy Weather
84°
Feels Like 90°
8
Humidity: 53%
Wind: 8 mph
UV Index: 54
2 PM
Sunny with a Chance of Thunderstorms
82°
Feels Like 88°
51
Humidity: 64%
Wind: 9 mph
UV Index: 49
3 PM
Cloudy Weather
81°
Feels Like 88°
47
Humidity: 65%
Wind: 10 mph
UV Index: 41
4 PM
Cloudy Weather
81°
Feels Like 84°
34
Humidity: 65%
Wind: 9 mph
UV Index: 30
5 PM
Cloudy Weather
79°
Feels Like 81°
15
Humidity: 63%
Wind: 9 mph
UV Index: 19
6 PM
Cloudy Weather
79°
Feels Like 81°
15
Humidity: 64%
Wind: 7 mph
UV Index: 10
7 PM
Cloudy Weather
77°
Feels Like 77°
19
Humidity: 69%
Wind: 6 mph
UV Index: 0
8 PM
Cloudy Night
75°
Feels Like 75°
43
Humidity: 74%
Wind: 5 mph
UV Index: 0
9 PM
Cloudy Night
73°
Feels Like 73°
47
Humidity: 81%
Wind: 5 mph
UV Index: 0
10 PM
Stormy Weather
72°
Feels Like 68°
51
Humidity: 86%
Wind: 6 mph
UV Index: 0
11 PM
Cloudy Night
70°
Feels Like 70°
40
Humidity: 90%
Wind: 6 mph
UV Index: 0

Hourly Air Quality Forecast - AQI (US EPA)

10 AM
70 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 15.80 µg/m³
  • PM10: 16.09 µg/m³
  • O₃: 39.35 ppb
  • NO₂: 5.91 ppb
  • SO₂: 1.49 ppb
  • CO: 242.57 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

11 AM
69 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 14.97 µg/m³
  • PM10: 15.33 µg/m³
  • O₃: 48.79 ppb
  • NO₂: 4.19 ppb
  • SO₂: 1.58 ppb
  • CO: 229.45 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

12 PM
68 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 14.82 µg/m³
  • PM10: 15.24 µg/m³
  • O₃: 54.84 ppb
  • NO₂: 3.38 ppb
  • SO₂: 1.61 ppb
  • CO: 219.08 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

1 PM
67 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 14.30 µg/m³
  • PM10: 14.81 µg/m³
  • O₃: 60.89 ppb
  • NO₂: 2.58 ppb
  • SO₂: 1.63 ppb
  • CO: 208.70 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

2 PM
67 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 13.72 µg/m³
  • PM10: 14.21 µg/m³
  • O₃: 66.93 ppb
  • NO₂: 1.77 ppb
  • SO₂: 1.66 ppb
  • CO: 198.32 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

3 PM
66 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 13.17 µg/m³
  • PM10: 13.66 µg/m³
  • O₃: 67.97 ppb
  • NO₂: 1.66 ppb
  • SO₂: 1.51 ppb
  • CO: 198.05 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

4 PM
66 AQI
Moderate air quality Dominant pollutant: pm25
Details

Pollutant Concentrations:

  • PM2.5: 13.11 µg/m³
  • PM10: 13.63 µg/m³
  • O₃: 69.01 ppb
  • NO₂: 1.56 ppb
  • SO₂: 1.37 ppb
  • CO: 197.77 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

5 PM
66 AQI
Moderate air quality Dominant pollutant: o3
Details

Pollutant Concentrations:

  • PM2.5: 13.28 µg/m³
  • PM10: 13.82 µg/m³
  • O₃: 70.05 ppb
  • NO₂: 1.45 ppb
  • SO₂: 1.23 ppb
  • CO: 197.49 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

6 PM
77 AQI
Moderate air quality Dominant pollutant: o3
Details

Pollutant Concentrations:

  • PM2.5: 13.57 µg/m³
  • PM10: 14.10 µg/m³
  • O₃: 67.13 ppb
  • NO₂: 2.33 ppb
  • SO₂: 1.21 ppb
  • CO: 207.74 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

7 PM
84 AQI
Moderate air quality Dominant pollutant: o3
Details

Pollutant Concentrations:

  • PM2.5: 13.91 µg/m³
  • PM10: 14.37 µg/m³
  • O₃: 64.22 ppb
  • NO₂: 3.21 ppb
  • SO₂: 1.19 ppb
  • CO: 217.99 ppb

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.