St. George (UT) Temperature by Month

St. George, Utah, United States of America has an average annual maximum temperature of 25°C (77°F), ranging from 10°C (50°F) in December to 39°C (102°F) in July. Below you'll find a full monthly breakdown and a comparison with cities worldwide.

Visitors to St. George will encounter a climate influenced by big temperature differences across the year. Nighttime temperatures range from 24°C (75°F) in July to -1°C (30°F) in December.

The chart below illustrates the average maximum day and minimum night temperatures in St. George by month:

The coldest point of the day usually falls between 4 AM and 6 AM, with temperatures peaking around 3 PM.

The chart below shows the average temperature throughout the year:

St. George's average annual maximum temperature is 25°C (77°F). To put that in context, here's how it compares to a few well-known destinations:

Seville, Spain averages 23°C (73°F) a year, one of the warmer cities in Western Europe, with long hot summers.

On the cooler end, Oslo, Norway averages just 10°C (50°F) annually, with pleasant summers but long, cold winters.

Seoul, South Korea averages 18°C (64°F) a year, with four clear seasons, cold winters, and hot humid summers.

Tokyo, Japan averages 21°C (70°F) a year, with hot summers, cool winters, and a well-defined cherry blossom spring.

Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.

The readings come from a range of sources, land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.

Whether a city sits on the coast or deep inland makes a significant difference to its climate. Coastal areas tend to have more stable temperatures year-round, large bodies of water absorb heat slowly in summer and release it gradually in winter, keeping extremes in check. Cities far from the sea don't benefit from that buffer, which is why continental climates tend to have hotter summers and colder winters than their coastal counterparts at the same latitude.

For more on St. George's weather, including monthly rainfall, sunshine hours, and humidity, visit our St. George climate page.