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December Weather in Saint George, United States

Last updated: June 24, 2025

In December, the average temperature in Saint George, United States hovers around 18°C (65°F), making it a comfortable time to visit. Expect a minimum of 7°C (44°F) and a potential maximum of 24°C (76°F). Be prepared for some rain, as you might encounter 70 mm (2.8 in) of precipitation spread over 6 days. With an average humidity level of 84%, the air may feel a bit damp, adding to the unique atmosphere of the season.

December Temperature in Saint George

In December in Saint George, the average temperature is 18°C (65°F), with maximums reaching 24°C (76°F) and minimums dropping to as low as 7°C (44°F). This mild climate makes it an ideal time for exploring the beautiful surroundings and enjoying outdoor activities.

December Weather in Saint George: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Saint George, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Saint George, December typically has an average temperature of 18°C (65°F), with highs reaching up to 24°C (76°F) and lows dropping to around 7°C (44°F).
JanFebMarAprMayJunJulAugSepOctNovDec616568727781828281787065
Data source: Temperature data for Saint George generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Saint George

In Saint George in December, the precipitation amount is 70 mm (2.8 in) over the course of 6 days.

December Precipitation Trends in Saint George

The chart displays monthly precipitation patterns in Saint George, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Saint George, December typically receives around 70 mm (2.8 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec43572066103159210221135714771
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Saint George

In Saint George in December, humidity is 84%. With an average temperature of 18°C (65°F), this humidity feels like a thick blanket enveloping you, making travel feel heavy and slightly uncomfortable as the air clings to your skin and limits your breath.

December Average Humidity in Saint George

This chart illustrates the average monthly humidity levels in Saint George, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Saint George is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%82%79%78%76%75%74%75%78%80%82%84%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Saint George

In Saint George in December, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Saint George.

Maximum UV Index Levels in Saint George for December

The chart shows the monthly maximum UV Index (UVI) for Saint George in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In December, the maximum UV index in Saint George typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec689111112121111975
Data source: Saint George December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How December Weather in Saint George Compares to Other Months

Weather in Saint George varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Saint George, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Saint George, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather16°C (61°F)43 mm (1.7 inches)82%high
February Weather18°C (65°F)57 mm (2.2 inches)82%very high
March Weather20°C (68°F)20 mm (0.8 inches)79%very high
April Weather22°C (73°F)66 mm (2.6 inches)78%extreme
May Weather25°C (77°F)103 mm (4.0 inches)76%extreme
June Weather27°C (81°F)159 mm (6.3 inches)75%extreme
July Weather28°C (82°F)210 mm (8.3 inches)74%extreme
August Weather28°C (83°F)221 mm (8.7 inches)74%extreme
September Weather27°C (82°F)135 mm (5.3 inches)78%extreme
October Weather26°C (78°F)71 mm (2.8 inches)79%very high
November Weather21°C (70°F)46 mm (1.8 inches)82%high
December Weather18°C (65°F)70 mm (2.8 inches)84%moderate

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