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December Weather in Glendale, United States

Last updated: June 24, 2025

In December, the average temperature in Glendale, United States is a mild 12°C (53°F). Expect temperatures to range from a chilly 1°C (33°F) to a warm 27°C (81°F). With an average precipitation of 77 mm (3.1 in) over 5 days, and humidity hovering around 76%, it's a month perfect for layering and exploring the outdoors while staying prepared for occasional showers!

December Temperature in Glendale

In December in Glendale, the average temperature is 12°C (53°F). Maximums can reach 27°C (81°F), while minimums can dip as low as 1°C (33°F). Be sure to pack clothing suitable for both warm days and cooler evenings during your visit.

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 12°C (53°F), with highs reaching up to 27°C (81°F) and lows dropping to around 1°C (33°F).
JanFebMarAprMayJunJulAugSepOctNovDec535456626471777774686153
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 77 mm (3.1 in) over a duration of 5 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 77 mm (3.1 inches) of precipitation spread over approximately 5 days.
JanFebMarAprMayJunJulAugSepOctNovDec7565862216222492478
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 76%. With an average temperature of 12°C (53°F), this humidity feels like a damp chill that settles into your bones, making outdoor activities a bit uncomfortable and necessitating layers to stay warm while exploring.

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 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 Glendale

In Glendale 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 Glendale for better planning.

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 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468101111121110754
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 Weather12°C (53°F)75 mm (3.0 inches)78%moderate
February Weather12°C (54°F)65 mm (2.6 inches)82%high
March Weather13°C (56°F)85 mm (3.4 inches)75%very high
April Weather17°C (62°F)22 mm (0.9 inches)68%very high
May Weather18°C (64°F)16 mm (0.6 inches)57%extreme
June Weather22°C (71°F)1 mm (0.1 inches)52%extreme
July Weather25°C (77°F)2 mm (0.1 inches)46%extreme
August Weather25°C (78°F)2 mm (0.1 inches)39%extreme
September Weather23°C (74°F)4 mm (0.1 inches)48%very high
October Weather20°C (68°F)9 mm (0.4 inches)59%high
November Weather16°C (61°F)24 mm (0.9 inches)72%moderate
December Weather12°C (53°F)77 mm (3.1 inches)76%moderate

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