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Today | Weather | Tuesday, September 2, 2025

Weather in Louisville, Kentucky

05:27 PM
Now
Cloudy WeatherCloudy weather, overcast skies with no rain.
81° F
Feels Like 79°
Precipitation 47 %
Wind 8 mph
UV Index (0 - 11+) 11
Humidity 48 %
Today
Sunny with a Chance of ThunderstormsSunny weather with a possibility of isolated thunderstorms developing later in the day.
Day 82°
Night 57°
Precipitation 65 %
Wind 5 mph
UV Index (0 - 11+) 11

Warning: Extreme UV Index Today: 11+

Overexposure to the sun's harmful UV rays can cause sunburn and increase the risk of developing skin cancer, including melanoma. Protect yourself by wearing clothing that covers your skin, sunglasses, and a hat. Apply a broad-spectrum sunscreen with an SPF of 30 or higher every two hours, even on cloudy days. Minimize direct sun exposure during peak hours (10 AM to 4 PM) to reduce the risk.

Louisville Weather Forecast Updated

24 minutes ago
Last updated on

Weather Forecast History

Last Year's Weather on This Day (September 2, 2024)

Cloudy WeatherCloudy weather, overcast skies with clouds.

Day

81°

Night

57°

Wind

9 mph

UV Index

7

Precipitation

1

Air quality in Louisville

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

Pollutant Concentrations:

PM2.5 14.17 µg/m³
PM10 31.32 µg/m³
O₃ 55.90 ppb
NO₂ 13.89 ppb
SO₂ 1.03 ppb
CO 214.05 ppb
PM2.5 – Fine particles <2.5μm
PM10 – Inhalable particles <10μm
O3 – Ozone
NO2 – Nitrogen dioxide
SO2 – Sulfur dioxide
CO – Carbon monoxide

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

View Hourly Air Quality Forecast