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December Weather in Boronda, United States

Last updated: June 24, 2025

In Boronda, United States, the average temperature in December hovers around 11°C (52°F). You'll experience a range from a cool minimum of 2°C (35°F) to a delightful maximum of 23°C (74°F). Be prepared for some rain, with 87 mm (3.4 in) of precipitation spread over 8 days. The air retains a high humidity level of 80%, making the atmosphere feel quite vibrant.

December Temperature in Boronda

In December in Boronda, the average temperature is 11°C (52°F). Maximum temperatures can reach 23°C (74°F), while minimums can drop as low as 2°C (35°F). Be prepared for a range of temperatures if you plan to visit during this time.

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

The chart illustrates December temperature patterns in Boronda, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Boronda, December typically has an average temperature of 11°C (52°F), with highs reaching up to 23°C (74°F) and lows dropping to around 2°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec525253555760616363605552
Data source: Temperature data for Boronda 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 Boronda

In Boronda in December, the precipitation amount is 87 mm (3.4 in), which occurs over a span of 8 days.

December Precipitation Trends in Boronda

The chart displays monthly precipitation patterns in Boronda, 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 Boronda, December typically receives around 87 mm (3.4 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec105858731212226193987
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Boronda

In Boronda in December, humidity is 80%. With an average temperature of 11°C (52°F), this humidity feels like a damp blanket wrapping around you, making travel a bit uncomfortable as you navigate through the thick, languid air.

December Average Humidity in Boronda

This chart illustrates the average monthly humidity levels in Boronda, 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 Boronda 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 Boronda

In Boronda 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 Boronda, you can check the information here.

Maximum UV Index Levels in Boronda for December

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

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

This table compares monthly weather conditions in Boronda, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather11°C (52°F)105 mm (4.1 inches)82%moderate
February Weather11°C (52°F)85 mm (3.4 inches)84%moderate
March Weather12°C (53°F)87 mm (3.4 inches)82%very high
April Weather13°C (55°F)31 mm (1.2 inches)78%very high
May Weather14°C (57°F)21 mm (0.8 inches)71%extreme
June Weather16°C (60°F)2 mm (0.1 inches)64%extreme
July Weather16°C (61°F)2 mm (0.1 inches)58%extreme
August Weather17°C (63°F)2 mm (0.1 inches)54%very high
September Weather17°C (63°F)6 mm (0.2 inches)55%very high
October Weather16°C (60°F)19 mm (0.7 inches)62%high
November Weather13°C (56°F)39 mm (1.5 inches)78%moderate
December Weather11°C (52°F)87 mm (3.4 inches)80%moderate

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