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December Weather in Byron, United States

Last updated: June 24, 2025

In Byron, United States, the average temperature in December hovers around 0°C (32°F), with minimums dipping as low as -18°C (1°F) and soaring to a maximum of 18°C (65°F). Expect 84 mm (3.3 in) of precipitation spread over 15 days, accompanied by a high average humidity of 87%. Prepare for a month of chilly and damp weather!

December Temperature in Byron

In December in Byron, the average temperature is 0°C (32°F). The maximum can reach 18°C (65°F) and the minimum can be as low as -18°C (1°F). While the temperatures can vary widely, it's essential to pack accordingly for your trip to Byron.

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

The chart illustrates December temperature patterns in Byron, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Byron, December typically has an average temperature of 0°C (32°F), with highs reaching up to 18°C (65°F) and lows dropping to around -18°C (1°F).
JanFebMarAprMayJunJulAugSepOctNovDec272935455867727064533932
Data source: Temperature data for Byron 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 Byron

In Byron in December, the total precipitation amount is 84 mm (3.3 in) recorded over a span of 15 days.

December Precipitation Trends in Byron

The chart displays monthly precipitation patterns in Byron, 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 Byron, December typically receives around 84 mm (3.3 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec7580731131058514597671388584
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Byron

In Byron in December, humidity is 87%. With an average temperature of 0°C (32°F), this humidity feels like a damp chill that clings to your skin, making travel uncomfortable and cold, as each breath brings a heavy moisture that seeps into your clothes.

December Average Humidity in Byron

This chart illustrates the average monthly humidity levels in Byron, 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 Byron is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%91%88%88%82%80%77%72%76%83%88%87%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Byron

In Byron 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 Byron, you can visit Hourly UV Index in Byron.

Maximum UV Index Levels in Byron for December

The chart shows the monthly maximum UV Index (UVI) for Byron 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 Byron typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3458910997532
Data source: Byron 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 Byron Compares to Other Months

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

This table compares monthly weather conditions in Byron, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (27°F)74 mm (2.9 inches)91%moderate
February Weather-2°C (29°F)80 mm (3.1 inches)91%moderate
March Weather2°C (35°F)73 mm (2.9 inches)88%moderate
April Weather7°C (46°F)113 mm (4.4 inches)88%very high
May Weather14°C (58°F)105 mm (4.1 inches)82%very high
June Weather20°C (67°F)85 mm (3.3 inches)79%very high
July Weather22°C (72°F)145 mm (5.7 inches)77%very high
August Weather21°C (71°F)97 mm (3.8 inches)72%very high
September Weather18°C (64°F)67 mm (2.6 inches)76%high
October Weather12°C (54°F)138 mm (5.4 inches)83%moderate
November Weather4°C (39°F)85 mm (3.3 inches)88%moderate
December Weather0°C (32°F)84 mm (3.3 inches)87%low

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