Extreme heat is forecasted for Saint George, Utah, with temperatures expected to climb to 105 degrees through the weekend, while the Storm Prediction Center warns of a critical risk for fire weather.
Rising Temperatures in Saint George
According to a forecast from the National Weather Service released on August 21, 2026, Saint George will experience a significant heatwave. High temperatures are projected to reach 104 degrees on Friday, August 21, with isolated showers and thunderstorms possible after noon. The forecast indicates a 20 percent chance of precipitation for the remainder of the day.
Weekend Heat Forecast
The intense heat is expected to persist through the weekend. The National Weather Service predicts highs of 105 degrees for both Saturday, August 22, and Sunday, August 23. Overnight lows are expected to remain high, staying around 80 degrees on both Saturday and Sunday nights.
Extended Heat Outlook
Looking further into next week, temperatures are expected to remain elevated. The National Weather Service forecasts a high of 103 degrees for Monday, August 24, followed by a high of 104 degrees on Tuesday, August 25. Temperatures are expected to reach 105 degrees again on Wednesday, August 26, and 106 degrees on Thursday, August 27.
Critical Fire Weather Risk
In addition to the heat, the Storm Prediction Center has identified significant fire weather risks for the area. As of its August 21, 2026, update, the center issued a Day 2 fire weather outlook for the region that designates a critical risk for fire weather. This follows a Day 1 outlook that identified an elevated risk of fire weather.
Current Atmospheric Conditions
The National Weather Service also noted specific atmospheric conditions for Saint George Regional Airport on August 21, 2026. At 10:20 AM MDT, the airport reported clear skies with a temperature of 90 degrees Fahrenheit and a heat index of 88 degrees Fahrenheit. Humidity was recorded at 29 percent, with a dewpoint of 54 degrees Fahrenheit.
Ongoing Weather Monitoring
The combination of triple-digit temperatures and critical fire weather risks highlights a period of dangerous conditions for the region. Residents are advised to monitor local weather updates as the heatwave continues through the end of August.
