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December Weather in Arcadia, United States

Last updated: June 24, 2025

In December, the average temperature in Arcadia, United States hovers around 2°C (35°F). While the mercury can dip to a chilly -22°C (-7°F), it can also soar to a pleasant 17°C (63°F). Prepare for about 66 mm (2.6 in) of precipitation over 11 days, and expect a high average humidity level of 86%.

December Temperature in Arcadia

In December in Arcadia, the average temperature is 2°C (35°F), with maximums reaching up to 17°C (63°F) and minimums dropping as low as -22°C (-7°F). Travelers should be prepared for a wide range of temperatures and pack accordingly for both warmer and colder conditions.

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

The chart illustrates December temperature patterns in Arcadia, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Arcadia, December typically has an average temperature of 2°C (35°F), with highs reaching up to 17°C (63°F) and lows dropping to around -22°C (-7°F).
JanFebMarAprMayJunJulAugSepOctNovDec293141506271757368574135
Data source: Temperature data for Arcadia 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 Arcadia

In Arcadia in December, the precipitation amount is 66 mm (2.6 in) spread over 11 days.

December Precipitation Trends in Arcadia

The chart displays monthly precipitation patterns in Arcadia, 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 Arcadia, December typically receives around 66 mm (2.6 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec7388981081401341229071958966
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Arcadia

In Arcadia in December humidity is 86%. With an average temperature of 2°C (35°F), this humidity feels like a damp chill that seeps into your bones, making traveling quite uncomfortable as your clothes cling to you and the cold air cuts through any warmth you try to find.

December Average Humidity in Arcadia

This chart illustrates the average monthly humidity levels in Arcadia, 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 Arcadia is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%87%88%81%82%81%78%78%82%89%86%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Arcadia

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

Maximum UV Index Levels in Arcadia for December

The chart shows the monthly maximum UV Index (UVI) for Arcadia 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 Arcadia typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098642
Data source: Arcadia 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 Arcadia Compares to Other Months

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

This table compares monthly weather conditions in Arcadia, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°F)73 mm (2.9 inches)88%moderate
February Weather0°C (32°F)88 mm (3.5 inches)87%moderate
March Weather5°C (41°F)98 mm (3.8 inches)87%high
April Weather10°C (50°F)108 mm (4.3 inches)87%very high
May Weather17°C (63°F)140 mm (5.5 inches)81%very high
June Weather22°C (72°F)134 mm (5.3 inches)82%very high
July Weather24°C (75°F)122 mm (4.8 inches)81%very high
August Weather23°C (73°F)90 mm (3.5 inches)78%very high
September Weather20°C (68°F)71 mm (2.8 inches)78%very high
October Weather14°C (57°F)95 mm (3.7 inches)82%high
November Weather5°C (42°F)88 mm (3.5 inches)89%moderate
December Weather2°C (35°F)66 mm (2.6 inches)86%low

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