Today | Weather | Tuesday, April 7, 2026

Weather in St. Peters, Missouri

10:29 AM
Now
Rainy Weather
43° F
Feels Like 36°
Precipitation 54 %
Wind 12 mph
UV Index (0 - 11+) 1
Humidity 65 %
Today
Rainy Weather
Day 57°
Night 43°
Precipitation 49 %
Wind 12 mph
UV Index (0 - 11+) 2

St. Peters Weather Forecast Updated

14 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (April 7, 2025)

Day

61°

Night

30°

Air Quality in St. Peters

NOW
41 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 2.59 µg/m³
PM10 3.1 µg/m³
O3 0.044 ppm
NO2 2 ppb
SO2 1.2 ppb
CO 0.13 ppm
NH3 4.13 µg/m³
NO 0.68 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)
PM2.52.59 µg/m³
PM103.1 µg/m³
O387.02 µg/m³
NO23.75 µg/m³
SO23.1 µg/m³
CO153.83 µg/m³
NH34.13 µg/m³
NO0.68 µg/m³