Hourly Weather Forecast for Louisville, Kentucky

Hourly Weather | Today › Monday, July 27, 2026

Active Weather Warnings

Heat Advisory

Louisville, Kentucky

11 AM

81°

Feels Like 93°

Humidity: 83%

UV Index: 3

Wind: 6 mph

12 PM

82°

Feels Like 97°

Humidity: 78%

UV Index: 5

Wind: 6 mph

1 PM

84°

Feels Like 100°

Humidity: 73%

UV Index: 7

Wind: 6 mph

2 PM

86°

Feels Like 102°

Humidity: 70%

UV Index: 9

Wind: 6 mph

3 PM

88°

Feels Like 102°

Humidity: 67%

UV Index: 7

Wind: 7 mph

4 PM

90°

Feels Like 102°

Humidity: 65%

UV Index: 5

Wind: 7 mph

5 PM

90°

Feels Like 100°

Humidity: 63%

UV Index: 3

Wind: 8 mph

6 PM

90°

Feels Like 99°

Humidity: 66%

UV Index: 2

Wind: 8 mph

7 PM

88°

Feels Like 93°

Humidity: 72%

UV Index: 0

Wind: 8 mph

8 PM

84°

Feels Like 95°

Humidity: 78%

UV Index: 0

Wind: 8 mph

9 PM

84°

Feels Like 95°

Humidity: 82%

UV Index: 0

Wind: 8 mph

10 PM

81°

Feels Like 90°

Humidity: 88%

UV Index: 0

Wind: 7 mph

11 PM

81°

Feels Like 90°

Humidity: 91%

UV Index: 0

Wind: 7 mph

Hourly Air Quality Forecast - AQI (US EPA)

11 AM

38 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 9.06 µg/m³
PM₁₀: 9.4 µg/m³
O₃: 0.010 ppm
NO₂: 2.1 ppb
SO₂: 0.2 ppb
CO: 0.13 ppm

Health Recommendations:

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

12 PM

41 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 9.8 µg/m³
PM₁₀: 10.18 µg/m³
O₃: 0.027 ppm
NO₂: 1.7 ppb
SO₂: 1.3 ppb
CO: 0.12 ppm

Health Recommendations:

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

1 PM

43 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 10.41 µg/m³
PM₁₀: 10.85 µg/m³
O₃: 0.034 ppm
NO₂: 1.4 ppb
SO₂: 2 ppb
CO: 0.12 ppm

Health Recommendations:

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

2 PM

46 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 10.95 µg/m³
PM₁₀: 11.43 µg/m³
O₃: 0.039 ppm
NO₂: 1.1 ppb
SO₂: 2.1 ppb
CO: 0.11 ppm

Health Recommendations:

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

3 PM

44 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 10.53 µg/m³
PM₁₀: 10.96 µg/m³
O₃: 0.045 ppm
NO₂: 0.9 ppb
SO₂: 1.9 ppb
CO: 0.11 ppm

Health Recommendations:

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

4 PM

43 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 9.99 µg/m³
PM₁₀: 10.36 µg/m³
O₃: 0.047 ppm
NO₂: 0.7 ppb
SO₂: 1.6 ppb
CO: 0.11 ppm

Health Recommendations:

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

5 PM

45 AQI

Good air quality Dominant pollutant: O₃

Details

Pollutant Concentrations:

PM_2.5: 9.92 µg/m³
PM₁₀: 10.26 µg/m³
O₃: 0.048 ppm
NO₂: 0.6 ppb
SO₂: 1.5 ppb
CO: 0.11 ppm

Health Recommendations:

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

6 PM

43 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 10.31 µg/m³
PM₁₀: 10.68 µg/m³
O₃: 0.043 ppm
NO₂: 1.1 ppb
SO₂: 1.3 ppb
CO: 0.11 ppm

Health Recommendations:

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

7 PM

44 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 10.64 µg/m³
PM₁₀: 11.07 µg/m³
O₃: 0.034 ppm
NO₂: 2.2 ppb
SO₂: 1 ppb
CO: 0.12 ppm

Health Recommendations:

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

8 PM

44 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 10.58 µg/m³
PM₁₀: 11.07 µg/m³
O₃: 0.027 ppm
NO₂: 3 ppb
SO₂: 0.8 ppb
CO: 0.13 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: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 10.28 µg/m³
PM₁₀: 10.82 µg/m³
O₃: 0.023 ppm
NO₂: 3.3 ppb
SO₂: 0.7 ppb
CO: 0.13 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: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 9.77 µg/m³
PM₁₀: 10.33 µg/m³
O₃: 0.021 ppm
NO₂: 2.9 ppb
SO₂: 0.6 ppb
CO: 0.13 ppm

Health Recommendations:

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

11 PM

37 AQI

Good air quality Dominant pollutant: PM_2.5

Details

Pollutant Concentrations:

PM_2.5: 8.85 µg/m³
PM₁₀: 9.41 µg/m³
O₃: 0.020 ppm
NO₂: 2.5 ppb
SO₂: 0.5 ppb
CO: 0.12 ppm

Health Recommendations:

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

Current Real-Time Air Quality Report

Weather Alerts and Warnings for Louisville

Moderate Expected Likely

Heat Advisory

Heat Advisory issued July 27 at 4:12AM EDT until July 27 at 9:00PM EDT by NWS Louisville KY

Jul 27, 11:00 AM → Jul 27, 9:00 PM

WHAT: Heat index values up to 110 expected.

WHERE: Portions of south central Indiana and north central,
northwest, and south central Kentucky.

WHEN: From 11 AM EDT /10 AM CDT/ this morning to 9 PM EDT /8 PM
CDT/ this evening.

IMPACTS: Hot temperatures and high humidity may cause heat
illnesses.

+ Read More

Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.

Updated: Jul 27, 9:36 AM Source: NWS Alert

Hourly Air Quality Forecast - AQI (US EPA)

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Weather Alerts and Warnings for Louisville

Heat Advisory

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