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December Weather in Santa Clarita, United States

Last updated: June 24, 2025

In Santa Clarita, United States, the average temperature in December hovers around 10°C (51°F), with a minimum drop to -1°C (30°F) and a maximum peak of 25°C (77°F). Expect about 68 mm (2.7 in) of precipitation spread over 5 days, contributing to the 76% average humidity that characterizes this time of year.

December Temperature in Santa Clarita

In December in Santa Clarita, the average temperature is 10°C (51°F). Maximum temperatures can reach 25°C (77°F), while minimums can dip as low as -1°C (30°F). This varied climate makes Santa Clarita an ideal destination for travelers seeking both mild days and cool evenings.

December Weather in Santa Clarita: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Santa Clarita, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Santa Clarita, December typically has an average temperature of 10°C (51°F), with highs reaching up to 25°C (77°F) and lows dropping to around -1°C (30°F).
JanFebMarAprMayJunJulAugSepOctNovDec515254616472787874665850
Data source: Temperature data for Santa Clarita 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 Santa Clarita

In Santa Clarita in December, the total precipitation amount is 68 mm (2.7 in) over the course of 5 days.

December Precipitation Trends in Santa Clarita

The chart displays monthly precipitation patterns in Santa Clarita, 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 Santa Clarita, December typically receives around 68 mm (2.7 inches) of precipitation spread over approximately 5 days.
JanFebMarAprMayJunJulAugSepOctNovDec6355712216322491968
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Santa Clarita

In Santa Clarita in December, humidity is 76%. With an average temperature of 10°C (51°F), this humidity feels like a damp chill that can make outdoor excursions feel much colder, requiring extra layers for comfort as you explore the area.

December Average Humidity in Santa Clarita

This chart illustrates the average monthly humidity levels in Santa Clarita, 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 Santa Clarita is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec78%82%76%68%58%52%46%39%48%59%72%76%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Santa Clarita

In Santa Clarita in December, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Santa Clarita for better planning.

Maximum UV Index Levels in Santa Clarita for December

The chart shows the monthly maximum UV Index (UVI) for Santa Clarita 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 Santa Clarita typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101111121110754
Data source: Santa Clarita 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 Santa Clarita Compares to Other Months

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

This table compares monthly weather conditions in Santa Clarita, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather10°C (51°F)63 mm (2.5 inches)78%moderate
February Weather11°C (52°F)55 mm (2.2 inches)82%high
March Weather12°C (55°F)71 mm (2.8 inches)75%very high
April Weather16°C (62°F)22 mm (0.9 inches)68%very high
May Weather18°C (65°F)16 mm (0.6 inches)57%extreme
June Weather22°C (72°F)3 mm (0.1 inches)52%extreme
July Weather25°C (78°F)1 mm (0.1 inches)46%extreme
August Weather26°C (78°F)2 mm (0.1 inches)39%extreme
September Weather23°C (74°F)4 mm (0.2 inches)48%very high
October Weather19°C (66°F)9 mm (0.3 inches)59%high
November Weather15°C (59°F)19 mm (0.7 inches)72%moderate
December Weather10°C (51°F)68 mm (2.7 inches)76%moderate

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