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December Weather in Los Osos, United States

Last updated: June 24, 2025

In December, the average temperature in Los Osos, United States is a pleasant 12°C (54°F), with a minimum of 5°C (42°F) and a maximum of 23°C (74°F). Expect about 76 mm (3.0 in) of precipitation over 6 days, with an average humidity level of 76%. Prepare for a mix of mild temps and occasional rain!

December Temperature in Los Osos

In December in Los Osos, the average temperature is 12°C (54°F). Maximums can reach 23°C (74°F), and minimums can be as low as 5°C (42°F). This pleasant weather makes it a great time to explore Los Osos and enjoy outdoor activities.

December Weather in Los Osos: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Los Osos, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Los Osos, December typically has an average temperature of 12°C (54°F), with highs reaching up to 23°C (74°F) and lows dropping to around 5°C (42°F).
JanFebMarAprMayJunJulAugSepOctNovDec545455575862646565635954
Data source: Temperature data for Los Osos 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 Los Osos

In Los Osos in December, the total precipitation amount reaches 76 mm (3.0 in) over the course of 6 days.

December Precipitation Trends in Los Osos

The chart displays monthly precipitation patterns in Los Osos, 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 Los Osos, December typically receives around 76 mm (3.0 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec110808423121111113276
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Los Osos

In Los Osos in December, humidity is 76%. With an average temperature of 12°C (54°F), this humidity feels like a heavy blanket enveloping you, making outdoor activities a bit uncomfortable and requiring frequent hydration while exploring.

December Average Humidity in Los Osos

This chart illustrates the average monthly humidity levels in Los Osos, 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 Los Osos is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%83%80%76%75%74%75%72%70%70%74%77%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Los Osos

In Los Osos 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 Los Osos, you can check the information here.

Maximum UV Index Levels in Los Osos for December

The chart shows the monthly maximum UV Index (UVI) for Los Osos 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 Los Osos typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec4589101212119753
Data source: Los Osos 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 Los Osos Compares to Other Months

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

This table compares monthly weather conditions in Los Osos, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather12°C (54°F)110 mm (4.3 inches)80%moderate
February Weather12°C (54°F)80 mm (3.2 inches)83%moderate
March Weather13°C (55°F)84 mm (3.3 inches)80%very high
April Weather14°C (57°F)23 mm (0.9 inches)76%very high
May Weather15°C (59°F)12 mm (0.5 inches)75%very high
June Weather16°C (62°F)1 mm (0.0 inches)74%extreme
July Weather18°C (64°F)1 mm (0.0 inches)75%extreme
August Weather18°C (65°F)1 mm (0.0 inches)72%extreme
September Weather18°C (65°F)1 mm (0.0 inches)70%very high
October Weather17°C (64°F)10 mm (0.4 inches)70%high
November Weather15°C (59°F)32 mm (1.2 inches)74%moderate
December Weather12°C (54°F)76 mm (3.0 inches)76%moderate

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