Today | Weather | Thursday, August 28, 2025

Weather in St. Louis, Missouri

03:24 PM
Now
Cloudy WeatherCloudy weather, overcast skies with clouds.
86° F
Feels Like 90°
Precipitation 0 %
Wind 7 mph
UV Index (0 - 11+) 11
Humidity 36 %
Today
Cloudy WeatherCloudy weather, overcast skies with clouds.
Day 86°
Night 57°
Precipitation 2 %
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.

Other:

Mostly bright and clear and beautiful.

St. Louis Weather Forecast Updated

Last updated on

Weather Forecast History

Last Year's Weather on This Day (August 28, 2024)

Cloudy WeatherCloudy weather, overcast skies with clouds.

Day

95°

Night

73°

Wind

6 mph

UV Index

8

Precipitation

25

Air quality in St. Louis

NOW
76 AQI
Moderate air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 5.03 µg/m³
PM10 5.12 µg/m³
O₃ 76.63 ppb
NO₂ 1.32 ppb
SO₂ 1.67 ppb
CO 184.31 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.