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December Weather in Denver, United States

Last updated: June 24, 2025

In December, the average temperature in Denver, United States hovers around 8°C (46°F). Expect a chilly minimum of -7°C (20°F) and the occasional warm peak reaching 25°C (77°F). You'll also encounter about 119 mm (4.7 in) of precipitation over 9 days, contributing to an average humidity level of 87%. Be prepared for a mix of cool and damp conditions!

December Temperature in Denver

In December in Denver, the average temperature is 8°C (46°F), with maximums reaching 25°C (77°F) and minimums dropping as low as -7°C (20°F). Travelers should prepare for a wide range of temperatures and dress in layers to enjoy their visit comfortably.

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

The chart illustrates December temperature patterns in Denver, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Denver, December typically has an average temperature of 8°C (46°F), with highs reaching up to 25°C (77°F) and lows dropping to around -7°C (20°F).
JanFebMarAprMayJunJulAugSepOctNovDec434853617076817874645046
Data source: Temperature data for Denver 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 Denver

In Denver in December, the precipitation amount is 119 mm (4.7 in) occurring over a span of 9 days.

December Precipitation Trends in Denver

The chart displays monthly precipitation patterns in Denver, 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 Denver, December typically receives around 119 mm (4.7 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec9011687111119798810312810787119
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Denver

In Denver in December, humidity is 87%. With an average temperature of 8°C (46°F), this humidity feels like a chilly, damp fog clinging to your skin, making outdoor activities a bit uncomfortable and causing even mild exertion to leave you feeling clammy and cold.

December Average Humidity in Denver

This chart illustrates the average monthly humidity levels in Denver, 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 Denver is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%85%84%82%83%82%80%74%75%79%87%87%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Denver

In Denver 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 Denver, you can check the information here.

Maximum UV Index Levels in Denver for December

The chart shows the monthly maximum UV Index (UVI) for Denver 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 Denver typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46810101111109853
Data source: Denver 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 Denver Compares to Other Months

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

This table compares monthly weather conditions in Denver, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (43°F)90 mm (3.5 inches)86%moderate
February Weather9°C (48°F)116 mm (4.6 inches)85%high
March Weather12°C (53°F)87 mm (3.4 inches)84%very high
April Weather16°C (62°F)111 mm (4.4 inches)82%very high
May Weather21°C (70°F)119 mm (4.7 inches)83%very high
June Weather25°C (77°F)79 mm (3.1 inches)82%extreme
July Weather27°C (81°F)88 mm (3.5 inches)80%extreme
August Weather26°C (79°F)103 mm (4.0 inches)74%very high
September Weather23°C (74°F)128 mm (5.0 inches)75%very high
October Weather18°C (65°F)107 mm (4.2 inches)79%very high
November Weather10°C (51°F)87 mm (3.4 inches)87%moderate
December Weather8°C (46°F)119 mm (4.7 inches)87%moderate

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