Today | Weather | Tuesday, April 7, 2026

Weather in St. Peters, Missouri

08:51 AM
Now
Rainy Weather
41° F
Feels Like 32°
Precipitation 57 %
Wind 12 mph
UV Index (0 - 11+) 1
Humidity 68 %
Today
Rainy Weather
Day 57°
Night 41°
Precipitation 55 %
Wind 12 mph
UV Index (0 - 11+) 2

St. Peters Weather Forecast Updated

19 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
40 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 2.87 µg/m³
PM10 3.43 µg/m³
O3 0.044 ppm
NO2 2.2 ppb
SO2 1.2 ppb
CO 0.14 ppm
NH3 4.45 µg/m³
NO 0.44 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)
PM2.52.87 µg/m³
PM103.43 µg/m³
O385.42 µg/m³
NO24.21 µg/m³
SO23.15 µg/m³
CO155.6 µg/m³
NH34.45 µg/m³
NO0.44 µg/m³