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December Weather in Glendale, United States

Last updated: June 24, 2025

In December, the average temperature in Glendale, United States hovers around 3°C (38°F). Be prepared for chilly days, with minimums potentially dropping to -9°C (17°F) and maximums reaching up to 18°C (64°F). Expect 146 mm (5.7 in) of precipitation spread over 15 days, contributing to a notably high average humidity of 87%. Stay cozy and dry during your visit!

December Temperature in Glendale

In December in Glendale, the average temperature is 3°C (38°F). The maximum can reach 18°C (64°F), while the minimum can be as low as -9°C (17°F). Be prepared for chilly days and pack layers to stay comfortable while exploring the area.

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

The chart illustrates December temperature patterns in Glendale, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Glendale, December typically has an average temperature of 3°C (38°F), with highs reaching up to 18°C (64°F) and lows dropping to around -9°C (17°F).
JanFebMarAprMayJunJulAugSepOctNovDec393943485461676862524438
Data source: Temperature data for Glendale 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 Glendale

In Glendale in December, the precipitation amount is 146 mm (5.7 in) over the course of 15 days.

December Precipitation Trends in Glendale

The chart displays monthly precipitation patterns in Glendale, 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 Glendale, December typically receives around 146 mm (5.7 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec1621861301115928165258113146
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Glendale

In Glendale in December humidity is 87%. With an average temperature of 3°C (38°F), this humidity feels like a chilly blanket wrapped around you, making travel quite uncomfortable as the cold dampness seeps into your clothes and lingers in the air, often leaving you shivering and longing for warmer, drier conditions.

December Average Humidity in Glendale

This chart illustrates the average monthly humidity levels in Glendale, 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 Glendale is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%85%86%83%83%83%78%67%66%77%87%87%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Glendale

In Glendale in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Glendale, you can visit Hourly UV Index in Glendale.

Maximum UV Index Levels in Glendale for December

The chart shows the monthly maximum UV Index (UVI) for Glendale 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 Glendale typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3468101110108642
Data source: Glendale 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 Glendale Compares to Other Months

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

This table compares monthly weather conditions in Glendale, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (39°F)162 mm (6.4 inches)84%moderate
February Weather4°C (39°F)186 mm (7.3 inches)85%moderate
March Weather6°C (43°F)130 mm (5.1 inches)86%high
April Weather9°C (48°F)111 mm (4.4 inches)83%very high
May Weather12°C (55°F)59 mm (2.3 inches)83%very high
June Weather16°C (61°F)28 mm (1.1 inches)83%extreme
July Weather20°C (68°F)1 mm (0.0 inches)78%very high
August Weather20°C (68°F)6 mm (0.3 inches)67%very high
September Weather16°C (62°F)52 mm (2.0 inches)66%very high
October Weather11°C (52°F)58 mm (2.3 inches)77%high
November Weather7°C (45°F)113 mm (4.4 inches)87%moderate
December Weather3°C (38°F)146 mm (5.7 inches)87%low

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