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December Weather in Hollister, United States

Last updated: June 24, 2025

In December, the average temperature in Hollister, United States hovers around 8°C (47°F). During this time, temperatures can plummet to a chilly -8°C (18°F) or rise to a pleasant 23°C (75°F). Expect about 99 mm (3.9 in) of precipitation spread over 9 days, contributing to an average humidity of 85%.

December Temperature in Hollister

In December in Hollister, the average temperature is 8°C (47°F), with maximums reaching 23°C (75°F) and minimums plummeting to -8°C (18°F). It's advisable to pack for a range of weather conditions to ensure a comfortable travel experience.

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 8°C (47°F), with highs reaching up to 23°C (75°F) and lows dropping to around -8°C (18°F).
JanFebMarAprMayJunJulAugSepOctNovDec434852617076807874655146
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 is 99 mm (3.9 in) during a span of 9 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 99 mm (3.9 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec9111185107121135132158122918299
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 85%. With an average temperature of 8°C (47°F), this humidity feels like a chilly dampness that clings to your skin, making outdoor activities feel less refreshing and more uncomfortable for traveling.

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 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%84%84%82%83%83%79%77%75%81%87%85%
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.
JanFebMarAprMayJunJulAugSepOctNovDec4689101111109853
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 Weather6°C (43°F)91 mm (3.6 inches)84%moderate
February Weather9°C (48°F)111 mm (4.4 inches)84%high
March Weather11°C (52°F)85 mm (3.3 inches)84%very high
April Weather16°C (62°F)107 mm (4.2 inches)82%very high
May Weather21°C (70°F)121 mm (4.8 inches)82%very high
June Weather24°C (76°F)135 mm (5.3 inches)83%extreme
July Weather27°C (80°F)132 mm (5.2 inches)79%extreme
August Weather26°C (79°F)157 mm (6.2 inches)77%very high
September Weather23°C (74°F)122 mm (4.8 inches)75%very high
October Weather18°C (65°F)91 mm (3.6 inches)81%very high
November Weather11°C (51°F)82 mm (3.2 inches)87%moderate
December Weather8°C (47°F)99 mm (3.9 inches)85%moderate

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