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December Weather in Hollister, United States

Last updated: June 24, 2025

In December, the average temperature in Hollister, United States is a comfortable 10°C (50°F). You'll experience a range with the minimum dipping to -2°C (28°F) and the maximum soaring to 25°C (77°F). Be prepared for some rain, with an expected precipitation amount of 83 mm (3.3 in) over approximately 8 days. Don't forget your umbrella, as the average humidity lingers around a high 80%!

December Temperature in Hollister

In December in Hollister, the average temperature is 10°C (50°F). Maximums can reach 25°C (77°F), while minimums can drop to as low as -2°C (28°F). Be prepared for a range of temperatures during your travels, as the weather can be quite variable!

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

The chart illustrates December temperature patterns in Hollister, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hollister, December typically has an average temperature of 10°C (50°F), with highs reaching up to 25°C (77°F) and lows dropping to around -2°C (28°F).
JanFebMarAprMayJunJulAugSepOctNovDec505152555863656665615549
Data source: Temperature data for Hollister 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 Hollister

In Hollister in December, the precipitation amount reaches 83 mm (3.3 in) over the course of 8 days.

December Precipitation Trends in Hollister

The chart displays monthly precipitation patterns in Hollister, 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 Hollister, December typically receives around 83 mm (3.3 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec100778326181115153283
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Hollister

In Hollister in December, humidity is 80%. With an average temperature of 10°C (50°F), this humidity feels like a damp chill enveloping you, making traveling somewhat uncomfortable as it seeps into your clothes and clings to your skin, leaving you longing for a cozy indoor refuge.

December Average Humidity in Hollister

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

In Hollister 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 Hollister, you can check the information here.

Maximum UV Index Levels in Hollister for December

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

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

This table compares monthly weather conditions in Hollister, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather10°C (50°F)99 mm (3.9 inches)82%moderate
February Weather10°C (51°F)76 mm (3.0 inches)84%moderate
March Weather11°C (53°F)83 mm (3.3 inches)82%very high
April Weather13°C (56°F)26 mm (1.0 inches)78%very high
May Weather14°C (58°F)17 mm (0.7 inches)71%extreme
June Weather17°C (63°F)1 mm (0.0 inches)64%extreme
July Weather18°C (65°F)0 mm (0.0 inches)58%extreme
August Weather19°C (67°F)1 mm (0.0 inches)54%very high
September Weather18°C (65°F)5 mm (0.2 inches)55%very high
October Weather16°C (61°F)15 mm (0.6 inches)62%high
November Weather13°C (55°F)32 mm (1.3 inches)78%moderate
December Weather10°C (50°F)83 mm (3.3 inches)80%moderate

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