Today | Weather | Wednesday, May 20, 2026

Weather in Louisville, Kentucky

12:45 AM
Now
Cloudy Night
61° F
Feels Like 59°
Precipitation 49 %
Wind 7 mph
Humidity 91 %
Today
Stormy Weather
Day 73°
Night 55°
Precipitation 70 %
Wind 7 mph
UV Index (0 - 11+) 2

Louisville Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (May 20, 2025)
Stormy Weather

Day

82°

Night

61°

Wind

8 mph

UV Index

7

Precipitation

100 %

Air Quality in Louisville

NOW
7 AQI
Good air quality Dominant pollutant: O3

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
NH3 1.36 µg/m³
NO 0.03 µg/m³
PM2.5 – 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)
PM2.51.43 µg/m³
PM101.93 µg/m³
O314.18 µg/m³
NO23.71 µg/m³
SO20.2 µg/m³
CO121.2 µg/m³
NH31.36 µg/m³
NO0.03 µg/m³