Today | Weather | Monday, April 6, 2026

Weather in St. Louis, Missouri

07:48 AM
Now
Sunny Weather
43° F
Feels Like 39°
Precipitation 0 %
Wind 9 mph
UV Index (0 - 11+) 1
Humidity 71 %
Today
Cloudy Weather
Day 64°
Night 43°
Precipitation 12 %
Wind 10 mph
UV Index (0 - 11+) 7

St. Louis Weather Forecast Updated

19 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (April 6, 2025)
Rainy Weather

Day

48°

Night

34°

Wind

9 mph

UV Index

2

Precipitation

49 %

Air Quality in St. Louis

NOW
35 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 1.36 µg/m³
PM10 1.57 µg/m³
O3 0.038 ppm
NO2 0.8 ppb
SO2 0.1 ppb
CO 0.12 ppm
NH3 1.18 µg/m³
NO 0.07 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)
PM2.51.36 µg/m³
PM101.57 µg/m³
O374.11 µg/m³
NO21.53 µg/m³
SO20.25 µg/m³
CO135.57 µg/m³
NH31.18 µg/m³
NO0.07 µg/m³