Today | Weather | Wednesday, February 25, 2026

Weather in St. George, Utah

09:19 PM
Now
Cloudy Night
64° F
Feels Like 63°
Precipitation 0 %
Wind 6 mph
Humidity 43 %
Today
Cloudy Night
Day 72°
Night 48°
Precipitation 0 %
Wind 6 mph

St. George Weather Forecast Updated

Last updated on

Air Quality in St. George

NOW
133 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 30.94 µg/m³
PM10 57.11 µg/m³
O3 0.080 ppm
NO2 1.5 ppb
SO2 0.3 ppb
CO 0.12 ppm
NH3 6.47 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:

Members of sensitive groups may experience health effects. The general public is not likely to be affected.

Show raw pollutant concentrations (µg/m³)
PM2.530.94 µg/m³
PM1057.11 µg/m³
O3157.03 µg/m³
NO22.76 µg/m³
SO20.76 µg/m³
CO140.85 µg/m³
NH36.47 µg/m³
NO0 µg/m³