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December Weather in Marin City, United States

Last updated: June 24, 2025

In December, the average temperature in Marin City, United States hovers around 11°C (52°F). You can expect temperatures to fluctuate between a minimum of 4°C (40°F) and a maximum of 20°C (69°F). Throughout the month, precipitation typically amounts to 95 mm (3.7 in) over about 9 days, contributing to an average humidity level of 79%. Stay prepared for a mix of mild weather and occasional rain!

December Temperature in Marin City

In December in Marin City, the average temperature is 11°C (52°F), with maximums reaching 20°C (69°F) and minimums dropping as low as 4°C (40°F). This mild climate makes Marin City an ideal destination for travelers looking to explore comfortably.

December Weather in Marin City: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Marin City, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Marin City, December typically has an average temperature of 11°C (52°F), with highs reaching up to 20°C (69°F) and lows dropping to around 4°C (40°F).
JanFebMarAprMayJunJulAugSepOctNovDec515253555659596162605552
Data source: Temperature data for Marin City 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 Marin City

In Marin City in December, the precipitation amount is 95 mm (3.7 in) over the course of 9 days.

December Precipitation Trends in Marin City

The chart displays monthly precipitation patterns in Marin City, 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 Marin City, December typically receives around 95 mm (3.7 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec1061097835203322305095
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Marin City

In Marin City in December humidity is 79%. With an average temperature of 11°C (52°F), this humidity feels like a damp chill that seeps through your clothes, making prolonged outdoor activities uncomfortable for travelers.

December Average Humidity in Marin City

This chart illustrates the average monthly humidity levels in Marin City, 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 Marin City is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%82%82%79%83%84%87%87%86%80%79%79%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Marin City

In Marin City 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 Marin City, you can check the information here.

Maximum UV Index Levels in Marin City for December

The chart shows the monthly maximum UV Index (UVI) for Marin City 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 Marin City typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3589101111109743
Data source: Marin City 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 Marin City Compares to Other Months

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

This table compares monthly weather conditions in Marin City, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather11°C (52°F)106 mm (4.2 inches)85%moderate
February Weather11°C (52°F)109 mm (4.3 inches)82%moderate
March Weather12°C (53°F)78 mm (3.1 inches)82%very high
April Weather13°C (55°F)35 mm (1.4 inches)79%very high
May Weather14°C (57°F)20 mm (0.8 inches)83%very high
June Weather15°C (60°F)3 mm (0.1 inches)84%extreme
July Weather15°C (60°F)3 mm (0.1 inches)87%extreme
August Weather16°C (61°F)2 mm (0.1 inches)87%very high
September Weather17°C (63°F)2 mm (0.1 inches)86%very high
October Weather16°C (60°F)30 mm (1.2 inches)80%high
November Weather13°C (56°F)50 mm (2.0 inches)79%moderate
December Weather11°C (52°F)95 mm (3.7 inches)79%moderate

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