Today | Weather | Wednesday, March 18, 2026

Weather in Louisville, Kentucky

06:47 AM
Now
Snowy Weather
30° F
Feels Like 21°
Precipitation 49 %
Wind 8 mph
Humidity 54 %
Today
Snowy Weather
Day 52°
Night 37°
Precipitation 45 %
Wind 13 mph
UV Index (0 - 11+) 3

Louisville Weather Forecast Updated

19 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (March 18, 2025)
Sunny Weather

Day

75°

Night

55°

Wind

14 mph

UV Index

5

Precipitation

2 %

Air Quality in Louisville

NOW
49 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 4.59 µg/m³
PM10 5.51 µg/m³
O3 0.053 ppm
NO2 1 ppb
SO2 1.3 ppb
CO 0.14 ppm
NH3 1.56 µg/m³
NO 0 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)
PM2.54.59 µg/m³
PM105.51 µg/m³
O3103.18 µg/m³
NO21.95 µg/m³
SO23.29 µg/m³
CO157.43 µg/m³
NH31.56 µg/m³
NO0 µg/m³