Today | Weather | Wednesday, May 20, 2026

Weather in St. George, Utah

03:51 PM
Now
Sunny Weather
84° F
Feels Like 88°
Precipitation 0 %
Wind 8 mph
UV Index (0 - 11+) 5
Humidity 9 %
Today
Sunny Weather
Day 84°
Night 55°
Precipitation 0 %
Wind 6 mph
UV Index (0 - 11+) 11

Warning: Extreme UV Index Today: 11

Overexposure to the sun's harmful UV rays can cause sunburn and increase the risk of developing skin cancer, including melanoma. Protect yourself by wearing clothing that covers your skin, sunglasses, and a hat. Apply a broad-spectrum sunscreen with an SPF of 30 or higher every two hours, even on cloudy days. Minimize direct sun exposure during peak hours (10 AM to 4 PM) to reduce the risk.

St. George Weather Forecast Updated

59 minutes ago
Last updated on

Air Quality in St. George

NOW
92 AQI
Moderate air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 1.56 µg/m³
PM10 3.91 µg/m³
O3 0.067 ppm
NO2 0.3 ppb
SO2 0.2 ppb
CO 0.08 ppm
NH3 1.7 µg/m³
NO 0.1 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 acceptable; however, for some pollutants, there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.

Show raw pollutant concentrations (µg/m³)
PM2.51.56 µg/m³
PM103.91 µg/m³
O3132.12 µg/m³
NO20.48 µg/m³
SO20.54 µg/m³
CO96.48 µg/m³
NH31.7 µg/m³
NO0.1 µg/m³