St. George, UT has a mild desert climate with hot summers and mild winters. The average high temperature in summer is around 100°F and the average low temperature in winter is around 35°F. It has an arid climate with very little precipitation due to the rain shadow effect of nearby mountains, making it one of the driest cities in North America. This also contributes to a lot of sunny days year-round, with more than 300 days of sunshine annually. St. George has very low humidity all year long, which can make it seem colder in winter and hotter in summer than it really is.
St. George, Utah gets 10 inches of rain, on average, per year. The US average is 38 inches of rain per year.
St. George averages 2 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 255 sunny days per year in St. George. The US average is 205 sunny days.
St. George gets some kind of precipitation, on average, 43 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.
Weather Highlights
Summer High: the July high is around 101 degrees
Winter Low: the January low is 29
Rain: averages 10 inches of rain a year
Snow: averages 2 inches of snow a year