Today | Weather | Monday, November 2, 2026

Weather in St. Peters, Missouri

12:40 AM
Now
Cloudy Weather
66° F
Feels Like 63°
Precipitation 7 %
Wind 12 mph
Humidity 86 %
Today
Cloudy Weather
Day 72°
Night 66°
Precipitation 25 %
Wind 12 mph
UV Index (0 - 11+) 1

St. Peters Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (November 2, 2025)
Partly Sunny with Showers

Day

52°

Night

39°

Wind

4 mph

UV Index

3

Precipitation

60 %

Air Quality in St. Peters

NOW
23 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 3.99 µg/m³
PM10 4.13 µg/m³
O3 0.025 ppm
NO2 1 ppb
SO2 0.2 ppb
CO 0.15 ppm
NH3 0.05 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 – 3.99 µg/m³
PM10 – 4.13 µg/m³
O3 – 48.13 µg/m³
NO2 – 1.85 µg/m³
SO2 – 0.46 µg/m³
CO – 167.77 µg/m³
NH3 – 0.05 µg/m³
NO – 0 µg/m³