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The average temperature of Saint George is 56.23Â°F, which is much higher than the Utah average temperature of 49.55Â°F and is higher than the national average temperature of 54.45Â°F.
Today's St George Island sea temperature is 24.5 Â°C. Statistics for 20 Apr (1981â2005) â mean: 21.6 Â°C, range: 19.8 Â°C to 24.7 Â°C. Warm in and out of the water temperature at St George Island today, but forecast to be overcast.