Today | Weather | Sunday, November 15, 2026

Weather in St. Louis, Missouri

04:47 AM
Now
Night
28° F
Feels Like 30°
Precipitation 0 %
Wind 2 mph
Humidity 92 %
Today
Cloudy Weather
Day 54°
Night 28°
Precipitation 0 %
Wind 5 mph
UV Index (0 - 11+) 3
Overnight Frost 1 AM – 7 AM
Tomorrow Morning Frost 12 AM – 7 AM

St. Louis Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (November 15, 2025)
Cloudy Night

Day

81°

Night

45°

Wind

9 mph

Precipitation

4 %

Air Quality in St. Louis

NOW
28 AQI
Good air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 6.74 µg/m³
PM10 8.48 µg/m³
O3 0.019 ppm
NO2 3.8 ppb
SO2 0.7 ppb
CO 0.18 ppm
NH3 0.24 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 considered satisfactory, and air pollution poses little or no risk.

Show raw pollutant concentrations (µg/m³)
PM2.5 – 6.74 µg/m³
PM10 – 8.48 µg/m³
O3 – 37.12 µg/m³
NO2 – 7.21 µg/m³
SO2 – 1.88 µg/m³
CO – 200.58 µg/m³
NH3 – 0.24 µg/m³
NO – 0 µg/m³