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December Weather in Leon, United States

Last updated: June 24, 2025

In December, the average temperature in Leon, United States hovers around 4°C (39°F). While you might experience a chill with minimums dipping to -15°C (6°F), the weather can also surprise you with highs reaching 23°C (74°F). Expect about 31 mm (1.2 in) of precipitation spread over 3 days, contributing to the region’s high average humidity of 85%.

December Temperature in Leon

In December in Leon, the average temperature is 4°C (39°F). Maximums can reach as high as 23°C (74°F), while minimums can dip to -15°C (6°F). This range makes it essential for travelers to prepare for both chilly and mild weather conditions.

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

The chart illustrates December temperature patterns in Leon, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Leon, December typically has an average temperature of 4°C (39°F), with highs reaching up to 23°C (74°F) and lows dropping to around -15°C (6°F).
JanFebMarAprMayJunJulAugSepOctNovDec343448556677797772574539
Data source: Temperature data for Leon 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 Leon

In Leon in December, the precipitation amount is 31 mm (1.2 in) over the course of 3 days.

December Precipitation Trends in Leon

The chart displays monthly precipitation patterns in Leon, 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 Leon, December typically receives around 31 mm (1.2 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec4433869119610782118841322731
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Leon

In Leon in December, humidity is 85%. With an average temperature of 4°C (39°F), this humidity feels like a damp chill that seeps into your bones, making traveling uncomfortable and requiring extra layers to ward off the cold and moisture.

December Average Humidity in Leon

This chart illustrates the average monthly humidity levels in Leon, 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 Leon is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec77%76%71%74%83%83%81%73%67%72%82%85%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Leon

In Leon 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 Leon, you can check the information here.

Maximum UV Index Levels in Leon for December

The chart shows the monthly maximum UV Index (UVI) for Leon 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 Leon typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36710101111109753
Data source: Leon 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 Leon Compares to Other Months

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

This table compares monthly weather conditions in Leon, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)44 mm (1.7 inches)77%moderate
February Weather1°C (35°F)33 mm (1.3 inches)76%high
March Weather9°C (49°F)86 mm (3.4 inches)71%high
April Weather13°C (55°F)90 mm (3.6 inches)73%very high
May Weather19°C (66°F)196 mm (7.7 inches)83%very high
June Weather25°C (77°F)107 mm (4.2 inches)83%extreme
July Weather26°C (80°F)82 mm (3.2 inches)81%extreme
August Weather25°C (77°F)118 mm (4.6 inches)73%very high
September Weather22°C (73°F)84 mm (3.3 inches)67%very high
October Weather14°C (58°F)132 mm (5.2 inches)72%high
November Weather7°C (45°F)26 mm (1.0 inches)82%moderate
December Weather4°C (39°F)31 mm (1.2 inches)85%moderate

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