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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 8°C (47°F). You can expect temperatures to range from a brisk -7°C (20°F) at minimum to a warm 25°C (78°F) at its peak. With an average of 120 mm (4.7 in) of precipitation spread over 9 days, the humidity tends to be quite high at 87%, making for a uniquely atmospheric experience.

December Temperature in Arcadia

In December in Arcadia, the average temperature is 8°C (47°F). The maximum can reach 25°C (78°F), while the minimum can drop as low as -7°C (20°F). Be sure to pack layers to stay comfortable during your travels!

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 8°C (47°F), with highs reaching up to 25°C (78°F) and lows dropping to around -7°C (20°F).
JanFebMarAprMayJunJulAugSepOctNovDec434954617076817974645146
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 120 mm (4.7 in) over the course of 9 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 120 mm (4.7 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec9112797121126778710613811493120
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 87%. With an average temperature of 8°C (47°F), this humidity feels like a damp chill that clings to your skin, making outdoor exploration uncomfortably muggy despite the cool air.

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 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%85%84%82%83%82%80%74%75%79%87%87%
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 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 Arcadia for better planning.

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 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46810111111109864
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 Weather6°C (44°F)90 mm (3.6 inches)86%moderate
February Weather9°C (49°F)127 mm (5.0 inches)85%high
March Weather12°C (54°F)96 mm (3.8 inches)84%very high
April Weather16°C (62°F)121 mm (4.8 inches)82%very high
May Weather21°C (71°F)126 mm (5.0 inches)83%extreme
June Weather25°C (77°F)77 mm (3.0 inches)82%extreme
July Weather27°C (81°F)87 mm (3.4 inches)80%extreme
August Weather26°C (79°F)106 mm (4.2 inches)74%very high
September Weather23°C (75°F)138 mm (5.4 inches)75%very high
October Weather18°C (65°F)114 mm (4.5 inches)79%very high
November Weather10°C (51°F)93 mm (3.6 inches)87%high
December Weather8°C (47°F)120 mm (4.7 inches)87%moderate

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