St. George Weather in December
St. George in December averages 10°C (50°F) during the day and -1°C (30°F) at night. This is the wettest month of the year, and part of the winter season.
Rainfall in St. George in December
With frequent rain showers this month, having an umbrella on hand will keep you dry. Past climate data indicates that roughly 6 days will see snow/rain, totalling around 33 mm (1.3 in) for the month. When rain does fall, showers tend to be light and brief. Most days will be dry.
Temperature in St. George in December
If you're visiting St. George in December, expect highs of 10°C (50°F) and overnight lows around -1°C (30°F). The winter season takes place during December. It stays cool throughout the day, so warm layers are a good idea from morning to evening. Nights drop below freezing to -1°C (30°F). An extra blanket is worth packing if you're unsure about the heating where you're staying. December often features the most temperate temperatures compared to other months.December in St. George has its charm. However, if you're seeking pleasant, dry and sunny weather, our weather planner can help you explore other destinations in the world.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our St. George's climate page.
St. George Temperature in December
Min Temperature
-1°C (30°F)
Max Temperature
10°C (50°F)
Chance of Rain
21%
Precipitation
33 mm (1.3 in)
Rainy days
6 days
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in St. George typically drop from around 11°C (52°F) at the start of December to approximately 7°C (45°F) by the end. Nights are very cold, with lows typically ranging from -4°C (25°F) to -1°C (30°F).
Average temperatures in December
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in December
Historical weather for St. George in December
Browse day-by-day weather records for St. George spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
St. George historical weather extremes in December
Our historical data for St. George spans 1976 to 2025, revealing these weather extremes.
- The warmest day in December was on December 3, 2017, with a maximum of 21°C (70°F).
Best Places in the United States of America in December
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in December →
perfect weather
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What to Wear in St. George in December
The weather can swing between comfortable and chilly in December, so flexibility is key. Pack a variety of tops, at least one warm layer, and both shorts and long pants. This gives you options no matter what the day brings. Light rain is possible, so consider bringing a small umbrella or rain jacket.What To Do in St. George in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our St. George's climate page.
See the full St. George climate overview or explore weather in the United States of America.
