December Weather in Saint George, United States

Last updated: June 24, 2025

The average temperature in Saint George, United States during December hovers around 11°C (53°F), with a brisk minimum of -5°C (23°F) and an occasional sunny peak at 27°C (81°F). Expect about 135 mm (5.3 in) of precipitation spread across 9 days, contributing to an average humidity of 87%. Make sure to pack accordingly!

December Temperature in Saint George

In December, in Saint George, the average temperature is 11°C (53°F), with maximums reaching 27°C (81°F) and minimums dropping as low as -5°C (23°F). This varied climate makes it important for travelers to pack for both warm and cold conditions.

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 11°C (53°F), with highs reaching up to 27°C (81°F) and lows dropping to around -5°C (23°F).
JanFebMarAprMayJunJulAugSepOctNovDec505559667479818177705652
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 135 mm (5.3 in) spread over 9 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 135 mm (5.3 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec739875109961221661441176466135
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 87%. With an average temperature of 11°C (53°F), this humidity feels like a damp chill that clings to your skin, making it uncomfortable for traveling as it combines the cool air with a sense of heaviness, leaving you yearning for warmth and dryness.

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 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%81%81%79%75%75%80%81%83%78%85%87%
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 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Saint George for better planning.

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 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec47810111111119864
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 Weather10°C (50°F)73 mm (2.9 inches)86%moderate
February Weather13°C (56°F)98 mm (3.9 inches)81%high
March Weather15°C (59°F)75 mm (3.0 inches)81%very high
April Weather19°C (66°F)109 mm (4.3 inches)79%very high
May Weather23°C (74°F)96 mm (3.8 inches)75%extreme
June Weather26°C (79°F)122 mm (4.8 inches)75%extreme
July Weather27°C (82°F)166 mm (6.6 inches)80%extreme
August Weather27°C (81°F)144 mm (5.7 inches)81%extreme
September Weather25°C (78°F)117 mm (4.6 inches)83%very high
October Weather21°C (70°F)64 mm (2.5 inches)78%very high
November Weather14°C (57°F)66 mm (2.6 inches)85%high
December Weather11°C (53°F)135 mm (5.3 inches)87%moderate

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