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December Weather in Byrnes Mill, United States

Last updated: June 24, 2025

In December, the average temperature in Byrnes Mill, United States is a brisk 4°C (40°F), with potential fluctuations from a chilling -16°C (3°F) to a comfortable 23°C (74°F). Expect 60 mm (2.4 in) of precipitation spread over about 7 days, contributing to an average humidity level of 86%. Bundle up and prepare for a mix of wintery elements!

December Temperature in Byrnes Mill

In December in Byrnes Mill, the average temperature is 4°C (40°F), with maximums reaching up to 23°C (74°F) and minimums dropping as low as -16°C (3°F). Travelers should prepare for a wide range of weather conditions, from chilly days to surprisingly warm afternoons.

December Weather in Byrnes Mill: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Byrnes Mill, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Byrnes Mill, December typically has an average temperature of 4°C (40°F), with highs reaching up to 23°C (74°F) and lows dropping to around -16°C (3°F).
JanFebMarAprMayJunJulAugSepOctNovDec333647556776807672594539
Data source: Temperature data for Byrnes Mill 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 Byrnes Mill

In Byrnes Mill in December, the precipitation amount is 60 mm (2.4 in) over the course of 7 days.

December Precipitation Trends in Byrnes Mill

The chart displays monthly precipitation patterns in Byrnes Mill, 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 Byrnes Mill, December typically receives around 60 mm (2.4 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec76821311281419593135571067360
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Byrnes Mill

In Byrnes Mill in December humidity is 86%. With an average temperature of 4°C (40°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities uncomfortable and travel cumbersome as you navigate through a thick, heavy air that clings to your skin.

December Average Humidity in Byrnes Mill

This chart illustrates the average monthly humidity levels in Byrnes Mill, 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 Byrnes Mill is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%80%80%80%82%83%81%80%76%76%85%86%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Byrnes Mill

In Byrnes Mill 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 Byrnes Mill, you can check the information here.

Maximum UV Index Levels in Byrnes Mill for December

The chart shows the monthly maximum UV Index (UVI) for Byrnes Mill 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 Byrnes Mill typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579101110109753
Data source: Byrnes Mill 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 Byrnes Mill Compares to Other Months

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

This table compares monthly weather conditions in Byrnes Mill, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (33°F)76 mm (3.0 inches)82%moderate
February Weather2°C (36°F)82 mm (3.2 inches)80%moderate
March Weather8°C (47°F)131 mm (5.2 inches)80%high
April Weather13°C (55°F)128 mm (5.0 inches)80%very high
May Weather19°C (67°F)141 mm (5.5 inches)82%very high
June Weather25°C (77°F)95 mm (3.8 inches)83%extreme
July Weather26°C (80°F)93 mm (3.6 inches)81%very high
August Weather25°C (76°F)135 mm (5.3 inches)80%very high
September Weather22°C (72°F)57 mm (2.2 inches)76%very high
October Weather15°C (59°F)106 mm (4.2 inches)76%high
November Weather7°C (45°F)73 mm (2.9 inches)85%moderate
December Weather4°C (40°F)60 mm (2.4 inches)86%moderate

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