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December Weather in Zion, United States

Last updated: June 24, 2025

In December, the average temperature in Zion, United States hovers around 1°C (35°F), with fluctuations between -15°C (5°F) and 14°C (58°F). This month experiences a total precipitation of 68 mm (2.7 in) over approximately 8 days, creating a moist atmosphere with an average humidity level of 81%.

December Temperature in Zion

In December in Zion, the average temperature is 1°C (35°F), with maximums reaching up to 14°C (58°F) and minimums dipping as low as -15°C (5°F). Travelers should be prepared for a chilly climate and dress in layers to stay comfortable during their visit.

December Weather in Zion: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Zion, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Zion, December typically has an average temperature of 1°C (35°F), with highs reaching up to 14°C (58°F) and lows dropping to around -15°C (5°F).
JanFebMarAprMayJunJulAugSepOctNovDec282835404859697166544034
Data source: Temperature data for Zion 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 Zion

In Zion in December, the precipitation amount is 68 mm (2.7 in) spread over 8 days.

December Precipitation Trends in Zion

The chart displays monthly precipitation patterns in Zion, 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 Zion, December typically receives around 68 mm (2.7 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec787980116156966258841507168
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Zion

In Zion in December, humidity is 81%. With an average temperature of 1°C (35°F), this humidity feels like a thick, cold blanket wrapping around you, making travel uncomfortable and the air heavy, which can dampen your spirits as you navigate through the chilly conditions.

December Average Humidity in Zion

This chart illustrates the average monthly humidity levels in Zion, 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 Zion is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%85%85%85%78%80%78%76%79%83%88%82%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Zion

In Zion in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Zion, you can visit Hourly UV Index in Zion.

Maximum UV Index Levels in Zion for December

The chart shows the monthly maximum UV Index (UVI) for Zion 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 Zion typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24689101098532
Data source: Zion 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 Zion Compares to Other Months

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

This table compares monthly weather conditions in Zion, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (28°F)78 mm (3.1 inches)85%low
February Weather-2°C (28°F)79 mm (3.1 inches)85%moderate
March Weather1°C (35°F)80 mm (3.1 inches)85%high
April Weather4°C (40°F)116 mm (4.6 inches)85%very high
May Weather9°C (48°F)155 mm (6.1 inches)78%very high
June Weather15°C (59°F)96 mm (3.8 inches)80%very high
July Weather21°C (69°F)62 mm (2.4 inches)78%very high
August Weather22°C (71°F)58 mm (2.3 inches)76%very high
September Weather19°C (66°F)83 mm (3.3 inches)79%very high
October Weather12°C (55°F)150 mm (5.9 inches)83%moderate
November Weather5°C (41°F)70 mm (2.8 inches)88%moderate
December Weather1°C (35°F)68 mm (2.7 inches)81%low

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