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Today Hourly 7 days 30 days Air Quality
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Hourly Weather | Today › Saturday, December 13, 2025
Active Weather Warnings
Louisville, Kentucky
8 AM
Foggy Weather
28°
Feels Like 25°
2
Humidity: 92%
Wind: 7 mph
UV Index: 0
9 AM
Foggy Weather
30°
Feels Like 25°
2
Humidity: 92%
Wind: 7 mph
UV Index: 0
10 AM
Foggy Weather
30°
Feels Like 27°
1
Humidity: 91%
Wind: 7 mph
UV Index: 0
11 AM
Foggy Weather
30°
Feels Like 27°
1
Humidity: 88%
Wind: 7 mph
UV Index: 1
12 PM
Foggy Weather
32°
Feels Like 27°
4
Humidity: 87%
Wind: 7 mph
UV Index: 1
1 PM
Cloudy Weather
32°
Feels Like 27°
49
Humidity: 85%
Wind: 8 mph
UV Index: 1
2 PM
Snowy Weather
34°
Feels Like 25°
66
Humidity: 84%
Wind: 8 mph
UV Index: 0
3 PM
Snowy Weather
34°
Feels Like 27°
66
Humidity: 80%
Wind: 8 mph
UV Index: 0
4 PM
Cloudy Weather
32°
Feels Like 27°
42
Humidity: 83%
Wind: 8 mph
UV Index: 0
5 PM
Cloudy Weather
32°
Feels Like 25°
38
Humidity: 83%
Wind: 9 mph
UV Index: 0
6 PM
Snowy Weather
30°
Feels Like 21°
42
Humidity: 85%
Wind: 9 mph
UV Index: 0
7 PM
Snowy Weather
30°
Feels Like 19°
58
Humidity: 86%
Wind: 9 mph
UV Index: 0
8 PM
Snowy Weather
28°
Feels Like 19°
62
Humidity: 84%
Wind: 9 mph
UV Index: 0
9 PM
Cloudy Weather
27°
Feels Like 19°
49
Humidity: 83%
Wind: 9 mph
UV Index: 0
10 PM
Snowy Weather
27°
Feels Like 16°
52
Humidity: 81%
Wind: 9 mph
UV Index: 0
11 PM
Cloudy Weather
25°
Feels Like 16°
48
Humidity: 80%
Wind: 9 mph
UV Index: 0

Hourly Air Quality Forecast - AQI (US EPA)

8 AM
66 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 19.51 µg/m³
  • PM10: 20.51 µg/m³
  • O3: 0.016 ppm
  • NO2: 6.3 ppb
  • SO2: 1.6 ppb
  • CO: 0.23 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

9 AM
64 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 18.46 µg/m³
  • PM10: 19.61 µg/m³
  • O3: 0.017 ppm
  • NO2: 6.6 ppb
  • SO2: 1.9 ppb
  • CO: 0.23 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

10 AM
60 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 16.85 µg/m³
  • PM10: 18.1 µg/m³
  • O3: 0.020 ppm
  • NO2: 5.9 ppb
  • SO2: 2.3 ppb
  • CO: 0.22 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

11 AM
56 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 14.81 µg/m³
  • PM10: 16.13 µg/m³
  • O3: 0.023 ppm
  • NO2: 5.4 ppb
  • SO2: 2.8 ppb
  • CO: 0.20 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

12 PM
53 AQI
Moderate air quality Dominant pollutant: PM2.5
Details

Pollutant Concentrations:

  • PM2.5: 13.37 µg/m³
  • PM10: 14.76 µg/m³
  • O3: 0.024 ppm
  • NO2: 4.8 ppb
  • SO2: 2.7 ppb
  • CO: 0.20 ppm

Health Recommendations:

Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.

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

Pollutant Concentrations:

  • PM2.5: 11.73 µg/m³
  • PM10: 13.2 µg/m³
  • O3: 0.024 ppm
  • NO2: 4.5 ppb
  • SO2: 2.7 ppb
  • CO: 0.19 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 7.23 µg/m³
  • PM10: 8.54 µg/m³
  • O3: 0.031 ppm
  • NO2: 4 ppb
  • SO2: 3.3 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.02 µg/m³
  • PM10: 7.25 µg/m³
  • O3: 0.033 ppm
  • NO2: 4.2 ppb
  • SO2: 3.3 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.89 µg/m³
  • PM10: 7.16 µg/m³
  • O3: 0.031 ppm
  • NO2: 5 ppb
  • SO2: 3.2 ppb
  • CO: 0.15 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.02 µg/m³
  • PM10: 7.29 µg/m³
  • O3: 0.029 ppm
  • NO2: 5.8 ppb
  • SO2: 3 ppb
  • CO: 0.16 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.27 µg/m³
  • PM10: 7.54 µg/m³
  • O3: 0.027 ppm
  • NO2: 6.4 ppb
  • SO2: 2.8 ppb
  • CO: 0.17 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.42 µg/m³
  • PM10: 7.61 µg/m³
  • O3: 0.024 ppm
  • NO2: 6.7 ppb
  • SO2: 2.6 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 6.23 µg/m³
  • PM10: 7.26 µg/m³
  • O3: 0.022 ppm
  • NO2: 6.6 ppb
  • SO2: 2.8 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 5.47 µg/m³
  • PM10: 6.31 µg/m³
  • O3: 0.021 ppm
  • NO2: 6.1 ppb
  • SO2: 2.7 ppb
  • CO: 0.19 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 4.35 µg/m³
  • PM10: 5.04 µg/m³
  • O3: 0.023 ppm
  • NO2: 5.4 ppb
  • SO2: 2.5 ppb
  • CO: 0.18 ppm

Health Recommendations:

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

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

Pollutant Concentrations:

  • PM2.5: 3.34 µg/m³
  • PM10: 3.93 µg/m³
  • O3: 0.026 ppm
  • NO2: 4.5 ppb
  • SO2: 2.2 ppb
  • CO: 0.17 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

Freezing Fog Advisory

Freezing Fog Advisory issued December 13 at 3:39AM EST until December 13 at 9:00AM EST by NWS Louisville KY
Dec 13, 3:39 AM → Dec 13, 9:00 AM
WHAT: For the Freezing Fog Advisory, visibility down to 1/4 mile
in freezing fog. For the Cold Weather Advisory, very cold wind
chills as low as 10 below expected.

WHERE: In Indiana, Crawford, Floyd, and Harrison IN Counties. In
Kentucky, Jefferson and Meade Counties.

WHEN: For the Freezing Fog Advisory, until 9 AM EST this morning.
For the Cold Weather Advisory, from 1 AM to 1 PM EST Sunday.

IMPACTS: The cold wind chills as low as 10 below zero could
result in hypothermia if precautions are not taken. Frostbite and
hypothermia will occur if unprotected skin is exposed to these
temperatures. Low visibility and patchy slick spots could make
driving conditions hazardous.
+ Read More
Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. Make frequent checks on older family, friends, and neighbors. Ensure portable heaters are used correctly. Do not use generators or grills inside. If driving, slow down, use your headlights, and leave plenty of distance ahead of you.
Updated: Dec 13, 7:11 AM Source: NWS Alert
Moderate Expected Likely

Winter Weather Advisory

Winter Weather Advisory issued December 13 at 3:06AM EST until December 14 at 7:00AM EST by NWS Louisville KY
Dec 13, 1:00 PM → Dec 14, 7:00 AM
WHAT: Snow expected. Total snow accumulations up to one inch.

WHERE: In Indiana, Floyd County. In Kentucky, Jefferson County.

WHEN: From 1 PM this afternoon to 7 AM EST Sunday.

IMPACTS: Plan on slippery road conditions.
+ Read More
Slow down and use caution while traveling. In Indiana, for Indiana Road Conditions please visit http://511in.org In Kentucky, for Kentucky Road Conditions please visit http://goky.ky.gov Be prepared for slippery roads. Slow down and use caution while driving. If you are going outside, watch your first few steps taken on stairs, sidewalks, and driveways. These surfaces could be icy and slippery, increasing your risk of a fall and injury.
Updated: Dec 13, 7:11 AM Source: NWS Alert