Today | Weather | Tuesday, September 22, 2026

Weather in Louisville, Kentucky

01:47 AM
Now
Cloudy Weather
66° F
Feels Like 64°
Precipitation 20 %
Wind 6 mph
Humidity 86 %
Today
Stormy Weather
Day 73°
Night 61°
Precipitation 55 %
Wind 7 mph
UV Index (0 - 11+) 1

Louisville Weather Forecast Updated

51 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (September 22, 2025)
Rainy Weather

Day

73°

Night

66°

Wind

6 mph

Precipitation

55 %

Air Quality in Louisville

NOW
51 AQI
Moderate air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 12.66 µg/m³
PM10 13.47 µg/m³
O3 0.020 ppm
NO2 2.6 ppb
SO2 0.4 ppb
CO 0.15 ppm
NH3 0.58 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 acceptable; however, for some pollutants, there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.

Show raw pollutant concentrations (µg/m³)
PM2.512.66 µg/m³
PM1013.47 µg/m³
O338.91 µg/m³
NO24.89 µg/m³
SO21.08 µg/m³
CO171.56 µg/m³
NH30.58 µg/m³
NO0 µg/m³