Today | Weather | Saturday, October 17, 2026

Weather in Louisville, Kentucky

10:11 AM
Now
Sunny Weather
48° F
Feels Like 46°
Precipitation 0 %
Wind 9 mph
UV Index (0 - 11+) 2
Humidity 72 %
Today
Sunny Weather
Day 57°
Night 39°
Precipitation 0 %
Wind 8 mph
UV Index (0 - 11+) 4

Louisville Weather Forecast Updated

3 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (October 17, 2025)
Cloudy Night

Day

77°

Night

57°

Wind

5 mph

Precipitation

7 %

Air Quality in Louisville

NOW
30 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 0.5 µg/m³
PM10 0.63 µg/m³
O3 0.032 ppm
NO2 1.1 ppb
SO2 0.3 ppb
CO 0.12 ppm
NH3 1 µg/m³
NO 0.32 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)
PM2.5 – 0.5 µg/m³
PM10 – 0.63 µg/m³
O3 – 63.14 µg/m³
NO2 – 2.06 µg/m³
SO2 – 0.71 µg/m³
CO – 137.25 µg/m³
NH3 – 1 µg/m³
NO – 0.32 µg/m³