Today | Weather | Tuesday, October 20, 2026

Active Weather Warnings

Special Weather Statement

Weather in Louisville, Kentucky

09:10 PM

Now

59° F

Feels Like 59°

Precipitation 0 %

Wind 5 mph

Humidity 57 %

Today

Day 73°

Night 43°

Precipitation 1 %

Wind 5 mph

Louisville Weather Forecast Updated

51 minutes ago

Last updated on October 20, 2026 at 8:18 PM

Weather Forecast History

Last Year's Weather on This Day (October 20, 2025)

Day

66°

Night

52°

Wind

13 mph

Precipitation

2 %

Air Quality in Louisville

NOW

35 AQI

Good air quality Dominant pollutant: PM_2.5

Pollutant Concentrations:

PM_2.5 8.47 µg/m³

PM₁₀ 9.51 µg/m³

O₃ 0.034 ppm

NO₂ 4.6 ppb

SO₂ 1 ppb

CO 0.15 ppm

NH₃ 2.09 µg/m³

NO 0 µg/m³

PM_2.5 – Fine particles <2.5μm

PM₁₀ – Inhalable particles <10μm

O₃ – Ozone

NO₂ – Nitrogen dioxide

SO₂ – Sulfur dioxide

CO – Carbon monoxide

NH₃ – Ammonia

NO – Nitric oxide

Health Recommendations:

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

Show raw pollutant concentrations (µg/m³)

PM_2.5 – 8.47 µg/m³

PM₁₀ – 9.51 µg/m³

O₃ – 67.6 µg/m³

NO₂ – 8.63 µg/m³

SO₂ – 2.67 µg/m³

CO – 169.11 µg/m³

NH₃ – 2.09 µg/m³

NO – 0 µg/m³

View Hourly Air Quality Forecast

Weather Alerts and Warnings for Louisville

Moderate Expected Observed

Special Weather Statement

Special Weather Statement issued October 20 at 3:21PM EDT by NWS Louisville KY

Oct 20, 3:21 PM → Oct 21, 5:00 AM

River valley fog is expected to form through the overnight lasting
through Wednesday morning. With clear skies and calm winds, valley
fog could become dense in localized areas. If traveling through
river valleys in the morning, increase the following distance and
use low-beam headlights. Be sure to drive slower through dense fog
and leave early to allow extra time to get to your destination.

Updated: Oct 20, 8:18 PM Source: NWS Alert