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December Weather in Aptos, United States

Last updated: June 24, 2025

In December, the average temperature in Aptos, United States hovers around 12°C (53°F), with a comfortable range from a minimum of 7°C (45°F) to a pleasant maximum of 21°C (70°F). Expect an average precipitation of 126 mm (4.9 in) over 9 days, creating a notably humidity level of 80%. Stay prepared for a mix of cozy and damp days!

December Temperature in Aptos

In December in Aptos, the average temperature is 12°C (53°F), with maximums reaching up to 21°C (70°F) and minimums potentially dropping to 7°C (45°F). This mild climate makes Aptos an ideal destination for travelers seeking comfortable weather and outdoor activities.

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

The chart illustrates December temperature patterns in Aptos, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Aptos, December typically has an average temperature of 12°C (53°F), with highs reaching up to 21°C (70°F) and lows dropping to around 7°C (45°F).
JanFebMarAprMayJunJulAugSepOctNovDec535253545557586061605653
Data source: Temperature data for Aptos 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 Aptos

In Aptos in December, the total precipitation amount is 126 mm (4.9 in) spread over a duration of 9 days.

December Precipitation Trends in Aptos

The chart displays monthly precipitation patterns in Aptos, 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 Aptos, December typically receives around 126 mm (4.9 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec148136110422342223161126
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Aptos

In Aptos in December humidity is 80%. With an average temperature of 12°C (53°F), this humidity feels like a damp chill clinging to your skin, making outdoor activities less inviting and prompting the need for layered clothing to stay comfortable while traveling.

December Average Humidity in Aptos

This chart illustrates the average monthly humidity levels in Aptos, 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 Aptos is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%84%82%78%71%64%59%54%55%62%78%80%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Aptos

In Aptos 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 Aptos, you can check the information here.

Maximum UV Index Levels in Aptos for December

The chart shows the monthly maximum UV Index (UVI) for Aptos 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 Aptos typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec4589111111109753
Data source: Aptos 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 Aptos Compares to Other Months

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

This table compares monthly weather conditions in Aptos, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather11°C (53°F)148 mm (5.8 inches)82%moderate
February Weather11°C (53°F)136 mm (5.3 inches)84%moderate
March Weather11°C (53°F)110 mm (4.3 inches)82%very high
April Weather12°C (54°F)42 mm (1.6 inches)78%very high
May Weather13°C (55°F)23 mm (0.9 inches)71%extreme
June Weather14°C (58°F)4 mm (0.2 inches)64%extreme
July Weather15°C (59°F)2 mm (0.1 inches)58%extreme
August Weather16°C (61°F)2 mm (0.1 inches)54%very high
September Weather16°C (62°F)2 mm (0.1 inches)55%very high
October Weather16°C (60°F)31 mm (1.2 inches)62%high
November Weather14°C (57°F)61 mm (2.4 inches)78%moderate
December Weather12°C (53°F)126 mm (4.9 inches)80%moderate

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