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December Weather in Livermore, United States

Last updated: June 24, 2025

In December, the average temperature in Livermore, United States is a cool 6°C (43°F). Expect a range from a chilly -13°C (9°F) to a mild 23°C (74°F). Rainfall is not uncommon, with 104 mm (4.1 in) expected over 9 days, while average humidity remains high at 88%. Prepare for a diverse climate this month!

December Temperature in Livermore

In December in Livermore, the average temperature is 6°C (43°F). Maximums can reach 23°C (74°F), while minimums can drop as low as -13°C (9°F). Be prepared for a wide range of temperatures, making it essential to pack layers for your travels.

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

The chart illustrates December temperature patterns in Livermore, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Livermore, December typically has an average temperature of 6°C (43°F), with highs reaching up to 23°C (74°F) and lows dropping to around -13°C (9°F).
JanFebMarAprMayJunJulAugSepOctNovDec374150586977807873624643
Data source: Temperature data for Livermore 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 Livermore

In Livermore in December, the precipitation amount is 104 mm (4.1 in) over the course of 9 days.

December Precipitation Trends in Livermore

The chart displays monthly precipitation patterns in Livermore, 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 Livermore, December typically receives around 104 mm (4.1 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec9214112614712312396889711988104
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Livermore

In Livermore in December, humidity is 88%. With an average temperature of 6°C (43°F), this humidity feels like a damp chill that seeps into your bones, making traveling uncomfortable and prompting you to seek warm shelter frequently.

December Average Humidity in Livermore

This chart illustrates the average monthly humidity levels in Livermore, 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 Livermore is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%86%86%82%83%83%80%74%71%78%88%88%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Livermore

In Livermore 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 Livermore, you can check the information here.

Maximum UV Index Levels in Livermore for December

The chart shows the monthly maximum UV Index (UVI) for Livermore 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 Livermore typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36710101110109753
Data source: Livermore 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 Livermore Compares to Other Months

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

This table compares monthly weather conditions in Livermore, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather3°C (37°F)92 mm (3.6 inches)87%moderate
February Weather5°C (41°F)141 mm (5.5 inches)86%high
March Weather10°C (50°F)126 mm (4.9 inches)86%high
April Weather14°C (58°F)147 mm (5.8 inches)82%very high
May Weather21°C (70°F)123 mm (4.8 inches)82%very high
June Weather25°C (77°F)123 mm (4.8 inches)83%extreme
July Weather27°C (80°F)96 mm (3.8 inches)80%very high
August Weather25°C (78°F)88 mm (3.4 inches)74%very high
September Weather23°C (74°F)97 mm (3.8 inches)71%very high
October Weather17°C (62°F)119 mm (4.7 inches)78%high
November Weather8°C (47°F)88 mm (3.5 inches)88%moderate
December Weather6°C (43°F)104 mm (4.1 inches)88%moderate

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