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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.
Sand hollow reservoir, utah current water temperature is: 62Â°F. This water temperature is too cold for water sports. Water temperatures at Sand Hollow Reservoir range from 81-84F from May to July, to 86F in August and September the very best swimming conditions.