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December Weather in Addison, United States

Last updated: June 24, 2025

In December, the average temperature in Addison, United States hovers around 9°C (48°F). Expect a minimum of -7°C (20°F) and a maximum of 23°C (74°F), making it essential to prepare for varying weather. With an average precipitation of 158 mm (6.2 in) spread across 12 days, and humidity levels reaching 88%, be ready for a humid and sometimes rainy month!

December Temperature in Addison

In December in Addison, the average temperature is 9°C (48°F), with maximums reaching 23°C (74°F) and minimums dropping as low as -7°C (20°F). It's advisable to pack layers to comfortably adapt to the varying temperatures while exploring the area.

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

The chart illustrates December temperature patterns in Addison, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Addison, December typically has an average temperature of 9°C (48°F), with highs reaching up to 23°C (74°F) and lows dropping to around -7°C (20°F).
JanFebMarAprMayJunJulAugSepOctNovDec445056627177807975665148
Data source: Temperature data for Addison 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 Addison

In Addison in December, the precipitation amount is 158 mm (6.2 in) over a span of 12 days.

December Precipitation Trends in Addison

The chart displays monthly precipitation patterns in Addison, 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 Addison, December typically receives around 158 mm (6.2 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec11319217315611815211312610412073158
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Addison

In Addison in December, humidity is 88%. With an average temperature of 9°C (48°F), this humidity feels like a damp chill settling into your bones, making outdoor exploration feel heavy and oppressive.

December Average Humidity in Addison

This chart illustrates the average monthly humidity levels in Addison, 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 Addison is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%87%85%82%83%82%78%67%64%75%87%89%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Addison

In Addison 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 Addison for better planning.

Maximum UV Index Levels in Addison for December

The chart shows the monthly maximum UV Index (UVI) for Addison 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 Addison typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec47810111111109754
Data source: Addison 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 Addison Compares to Other Months

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

This table compares monthly weather conditions in Addison, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather7°C (45°F)113 mm (4.5 inches)87%moderate
February Weather10°C (50°F)192 mm (7.6 inches)87%high
March Weather14°C (57°F)173 mm (6.8 inches)85%very high
April Weather16°C (62°F)156 mm (6.1 inches)82%very high
May Weather22°C (71°F)118 mm (4.6 inches)83%extreme
June Weather25°C (77°F)152 mm (6.0 inches)82%extreme
July Weather27°C (80°F)112 mm (4.4 inches)78%extreme
August Weather26°C (80°F)126 mm (4.9 inches)67%very high
September Weather24°C (76°F)103 mm (4.1 inches)64%very high
October Weather19°C (66°F)120 mm (4.7 inches)74%high
November Weather11°C (51°F)73 mm (2.9 inches)87%moderate
December Weather9°C (48°F)158 mm (6.2 inches)88%moderate

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