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December Weather in Lyons, United States

Last updated: June 24, 2025

In December, the average temperature in Lyons, United States hovers around 3°C (37°F). Expect a chilling minimum of -13°C (8°F), with a rare peak of 24°C (76°F). Precipitation is moderate, totaling 29 mm (1.2 in) over just 2 days, while humidity remains high at 83%. Stay prepared for varied weather!

December Temperature in Lyons

In December in Lyons, the average temperature is 3°C (37°F). Maximums can reach 24°C (76°F), and minimums can be as low as -13°C (8°F). Be prepared for a wide range of temperatures if you plan to visit during this time.

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

The chart illustrates December temperature patterns in Lyons, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lyons, December typically has an average temperature of 3°C (37°F), with highs reaching up to 24°C (76°F) and lows dropping to around -13°C (8°F).
JanFebMarAprMayJunJulAugSepOctNovDec323347546578817772574537
Data source: Temperature data for Lyons 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 Lyons

In Lyons in December, the precipitation amount is 29 mm (1.2 in) over a period of 2 days.

December Precipitation Trends in Lyons

The chart displays monthly precipitation patterns in Lyons, 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 Lyons, December typically receives around 29 mm (1.2 inches) of precipitation spread over approximately 2 days.
JanFebMarAprMayJunJulAugSepOctNovDec2727695416072709265852629
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Lyons

In Lyons in December, humidity is 83%. With an average temperature of 3°C (37°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities less enjoyable and encouraging travelers to seek indoor attractions or cozy cafes.

December Average Humidity in Lyons

This chart illustrates the average monthly humidity levels in Lyons, 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 Lyons is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec75%78%67%70%82%81%80%80%74%71%79%83%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Lyons

In Lyons 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 Lyons, you can check the information here.

Maximum UV Index Levels in Lyons for December

The chart shows the monthly maximum UV Index (UVI) for Lyons 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 Lyons typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579101111109753
Data source: Lyons 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 Lyons Compares to Other Months

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

This table compares monthly weather conditions in Lyons, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (33°F)27 mm (1.0 inches)74%moderate
February Weather1°C (33°F)27 mm (1.1 inches)78%moderate
March Weather8°C (47°F)69 mm (2.7 inches)67%high
April Weather12°C (55°F)54 mm (2.1 inches)70%very high
May Weather18°C (65°F)160 mm (6.3 inches)82%very high
June Weather25°C (78°F)72 mm (2.9 inches)81%extreme
July Weather27°C (81°F)70 mm (2.8 inches)80%extreme
August Weather25°C (78°F)92 mm (3.6 inches)80%very high
September Weather22°C (73°F)65 mm (2.6 inches)73%very high
October Weather14°C (57°F)85 mm (3.4 inches)71%high
November Weather7°C (45°F)26 mm (1.0 inches)79%moderate
December Weather3°C (37°F)29 mm (1.2 inches)83%moderate

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