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December Weather in Chatsworth, United States

Last updated: June 24, 2025

In December, the average temperature in Chatsworth, United States hovers around 8°C (46°F), making it a brisk time of year. Temperatures can dip as low as -9°C (17°F) and may reach a mild 22°C (72°F). Expect considerable moisture, with precipitation totaling 155 mm (6.1 in) spread over approximately 12 days. The air is often heavy, with average humidity levels at 88%, adding to the chill.

December Temperature in Chatsworth

In December in Chatsworth, the average temperature is 8°C (46°F). Maximums can reach 22°C (72°F), and minimums can drop as low as -9°C (17°F). It's advisable for travelers to prepare for a wide range of temperatures during their visit.

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

The chart illustrates December temperature patterns in Chatsworth, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Chatsworth, December typically has an average temperature of 8°C (46°F), with highs reaching up to 22°C (72°F) and lows dropping to around -9°C (17°F).
JanFebMarAprMayJunJulAugSepOctNovDec434854606975787773645046
Data source: Temperature data for Chatsworth 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 Chatsworth

In Chatsworth in December, the total precipitation amount reaches 155 mm (6.1 in) over the course of 12 days.

December Precipitation Trends in Chatsworth

The chart displays monthly precipitation patterns in Chatsworth, 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 Chatsworth, December typically receives around 155 mm (6.1 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec11920517215311413012615210613592155
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Chatsworth

In Chatsworth in December, humidity is 88%. With an average temperature of 8°C (46°F), this humidity feels like a damp chill that seeps into your bones, making outdoor exploration feel much more uncomfortable than the temperature alone would suggest.

December Average Humidity in Chatsworth

This chart illustrates the average monthly humidity levels in Chatsworth, 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 Chatsworth is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%86%86%82%85%85%83%76%76%80%88%88%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Chatsworth

In Chatsworth 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 Chatsworth for better planning.

Maximum UV Index Levels in Chatsworth for December

The chart shows the monthly maximum UV Index (UVI) for Chatsworth 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 Chatsworth typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46810111111109764
Data source: Chatsworth 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 Chatsworth Compares to Other Months

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

This table compares monthly weather conditions in Chatsworth, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (43°F)119 mm (4.7 inches)86%moderate
February Weather9°C (48°F)205 mm (8.1 inches)86%high
March Weather12°C (54°F)172 mm (6.8 inches)86%very high
April Weather16°C (61°F)153 mm (6.0 inches)82%very high
May Weather21°C (70°F)114 mm (4.5 inches)85%extreme
June Weather24°C (75°F)130 mm (5.1 inches)85%extreme
July Weather26°C (78°F)126 mm (4.9 inches)83%extreme
August Weather25°C (77°F)152 mm (6.0 inches)76%very high
September Weather23°C (73°F)106 mm (4.2 inches)76%very high
October Weather18°C (64°F)135 mm (5.3 inches)80%high
November Weather10°C (50°F)92 mm (3.6 inches)88%high
December Weather8°C (46°F)155 mm (6.1 inches)88%moderate

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