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December Weather in Sundown, United States

Last updated: June 24, 2025

In December, the average temperature in Sundown, United States hovers around 7°C (45°F), with a minimum drop to -8°C (18°F) and a maximum rise to 25°C (78°F). Expect 12 mm (0.5 in) of precipitation spread over 2 days, contributing to an average humidity of 80%.

December Temperature in Sundown

In December in Sundown, the average temperature is 7°C (45°F). The maximum can reach 25°C (78°F), while the minimum can drop as low as -8°C (18°F). Be prepared for varying weather conditions when traveling during this time.

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

The chart illustrates December temperature patterns in Sundown, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sundown, December typically has an average temperature of 7°C (45°F), with highs reaching up to 25°C (78°F) and lows dropping to around -8°C (18°F).
JanFebMarAprMayJunJulAugSepOctNovDec414555617179818073615145
Data source: Temperature data for Sundown 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 Sundown

In Sundown in December, the precipitation amount is 12 mm (0.5 in) over the course of 2 days.

December Precipitation Trends in Sundown

The chart displays monthly precipitation patterns in Sundown, 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 Sundown, December typically receives around 12 mm (0.5 inches) of precipitation spread over approximately 2 days.
JanFebMarAprMayJunJulAugSepOctNovDec161136175448273751551612
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Sundown

In Sundown in December, humidity is 80%. With an average temperature of 7°C (45°F), this humidity feels like you're wrapped in a damp blanket, making it quite uncomfortable for traveling and leaving you feeling chilly and clammy as you explore the area.

December Average Humidity in Sundown

This chart illustrates the average monthly humidity levels in Sundown, 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 Sundown is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec75%75%61%61%67%69%69%66%71%71%82%80%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Sundown

In Sundown in December, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Sundown for better planning.

Maximum UV Index Levels in Sundown for December

The chart shows the monthly maximum UV Index (UVI) for Sundown 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 Sundown typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec579111112121210864
Data source: Sundown 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 Sundown Compares to Other Months

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

This table compares monthly weather conditions in Sundown, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)16 mm (0.6 inches)75%moderate
February Weather7°C (45°F)11 mm (0.4 inches)74%high
March Weather13°C (55°F)36 mm (1.4 inches)61%very high
April Weather16°C (62°F)17 mm (0.7 inches)61%extreme
May Weather22°C (72°F)54 mm (2.1 inches)67%extreme
June Weather26°C (79°F)48 mm (1.9 inches)69%extreme
July Weather27°C (81°F)27 mm (1.0 inches)69%extreme
August Weather27°C (80°F)37 mm (1.5 inches)66%extreme
September Weather23°C (73°F)51 mm (2.0 inches)71%very high
October Weather16°C (61°F)55 mm (2.2 inches)71%very high
November Weather10°C (51°F)16 mm (0.6 inches)82%high
December Weather7°C (45°F)12 mm (0.5 inches)80%moderate

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