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December Weather in Saint George, United States

Last updated: June 24, 2025

The average temperature in Saint George, United States during December hovers around 3°C (37°F), with lows dipping to -18°C (0°F) and highs reaching up to 24°C (75°F). Rainfall can be expected, averaging 28 mm (1.1 in) over the course of 3 days. Additionally, the air tends to be quite humid, with an average humidity level of 84%. Be sure to prepare accordingly!

December Temperature in Saint George

In December, in Saint George, the average temperature is 3°C (37°F). Maximum temperatures can reach up to 24°C (75°F), while minimums can drop as low as -18°C (0°F). Be prepared for a wide temperature range and pack accordingly for your travels!

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 3°C (37°F), with highs reaching up to 24°C (75°F) and lows dropping to around -18°C (0°F).
JanFebMarAprMayJunJulAugSepOctNovDec313246546578817772564437
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 28 mm (1.1 in) over the course of 3 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 28 mm (1.1 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec32298869187868112169983428
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 3°C (37°F), this humidity feels like a damp chill that seeps into your bones, making outdoor excursions brisk and invigorating, yet requiring extra layers to stay comfortable.

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.
JanFebMarAprMayJunJulAugSepOctNovDec76%78%70%73%82%82%81%78%71%71%81%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 is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Saint George, you can check the information here.

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 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3569101111109643
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 Weather-1°C (31°F)32 mm (1.3 inches)76%moderate
February Weather0°C (32°F)29 mm (1.1 inches)77%moderate
March Weather8°C (46°F)88 mm (3.5 inches)70%high
April Weather12°C (54°F)69 mm (2.7 inches)73%very high
May Weather19°C (66°F)187 mm (7.4 inches)82%very high
June Weather26°C (78°F)86 mm (3.4 inches)82%extreme
July Weather27°C (81°F)81 mm (3.2 inches)81%extreme
August Weather25°C (77°F)121 mm (4.7 inches)78%very high
September Weather22°C (73°F)69 mm (2.7 inches)71%very high
October Weather14°C (57°F)98 mm (3.8 inches)71%high
November Weather7°C (44°F)34 mm (1.3 inches)81%moderate
December Weather3°C (37°F)28 mm (1.1 inches)84%moderate

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