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December Weather in Cheyenne, United States

Last updated: June 24, 2025

In Cheyenne, United States, the average temperature in December hovers around 5°C (42°F). Expect chilly conditions, with minimums plummeting to -11°C (13°F) and maximums peaking at 27°C (80°F). During this month, you can anticipate 21 mm (0.8 in) of precipitation spread over 2 days, resulting in an average humidity of 84%. Stay prepared and bundle up!

December Temperature in Cheyenne

In December in Cheyenne, the average temperature is 5°C (42°F), with maximums reaching 27°C (80°F) and minimums dropping as low as -11°C (13°F). Travelers should be prepared for a wide range of temperatures, making layering essential for comfort throughout the day.

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

The chart illustrates December temperature patterns in Cheyenne, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Cheyenne, December typically has an average temperature of 5°C (42°F), with highs reaching up to 27°C (80°F) and lows dropping to around -11°C (13°F).
JanFebMarAprMayJunJulAugSepOctNovDec373851586877818073594842
Data source: Temperature data for Cheyenne 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 Cheyenne

In Cheyenne in December, the precipitation amount is 21 mm (0.8 in) over a period of 2 days.

December Precipitation Trends in Cheyenne

The chart displays monthly precipitation patterns in Cheyenne, 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 Cheyenne, December typically receives around 21 mm (0.8 inches) of precipitation spread over approximately 2 days.
JanFebMarAprMayJunJulAugSepOctNovDec2618795610573494555731321
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Cheyenne

In Cheyenne in December, humidity is 84%. With an average temperature of 5°C (42°F), this humidity feels like a thick blanket wrapping around you, making every step feel heavier while traveling.

December Average Humidity in Cheyenne

This chart illustrates the average monthly humidity levels in Cheyenne, 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 Cheyenne is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%76%70%72%82%82%80%72%64%71%81%84%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Cheyenne

In Cheyenne 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 Cheyenne for better planning.

Maximum UV Index Levels in Cheyenne for December

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

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

This table compares monthly weather conditions in Cheyenne, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather3°C (38°F)26 mm (1.0 inches)76%moderate
February Weather4°C (39°F)18 mm (0.7 inches)76%high
March Weather11°C (51°F)79 mm (3.1 inches)70%very high
April Weather14°C (58°F)56 mm (2.2 inches)72%very high
May Weather20°C (68°F)105 mm (4.2 inches)82%extreme
June Weather25°C (78°F)73 mm (2.9 inches)82%extreme
July Weather27°C (81°F)49 mm (1.9 inches)80%extreme
August Weather26°C (80°F)45 mm (1.8 inches)72%extreme
September Weather23°C (74°F)55 mm (2.2 inches)64%very high
October Weather15°C (59°F)73 mm (2.9 inches)71%high
November Weather9°C (48°F)13 mm (0.5 inches)81%moderate
December Weather5°C (42°F)21 mm (0.8 inches)84%moderate

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