Today | Weather | Thursday, July 16, 2026

Weather in St. Louis, Missouri

12:35 AM
Now
Cloudy Weather
77° F
Feels Like 84°
Precipitation 26 %
Wind 5 mph
Humidity 92 %
Today
Sunny with a Chance of Thunderstorms
Day 90°
Night 73°
Precipitation 55 %
Wind 5 mph
UV Index (0 - 11+) 6

St. Louis Weather Forecast Updated

49 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (July 16, 2025)
Cloudy Weather

Day

97°

Night

73°

Wind

7 mph

UV Index

11

Precipitation

65 %

Air Quality in St. Louis

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

Pollutant Concentrations:

PM2.5 5.1 µg/m³
PM10 5.28 µg/m³
O3 0.012 ppm
NO2 0.9 ppb
SO2 0 ppb
CO 0.10 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)
PM2.55.1 µg/m³
PM105.28 µg/m³
O323.74 µg/m³
NO21.78 µg/m³
SO20.12 µg/m³
CO116.92 µg/m³
NH30.24 µg/m³
NO0 µg/m³