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December Weather in Sheridan, United States

Last updated: June 24, 2025

In Sheridan, United States, the average temperature in December hovers around -8°C (18°F), with a potential dip to a chilling -27°C (-16°F) and a milder peak of 12°C (53°F). Expect 27 mm (1.1 in) of precipitation spread over 7 days, along with a notably high average humidity of 94%. Be prepared for a frosty yet memorable experience!

December Temperature in Sheridan

In December in Sheridan, the average temperature is -8°C (18°F). Maximums can reach 12°C (53°F), and minimums can be as low as -27°C (-16°F). Travelers should be prepared for a range of temperatures, from chilly days to extremely cold nights, making warm clothing essential for enjoyment of the area's winter activities.

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

The chart illustrates December temperature patterns in Sheridan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sheridan, December typically has an average temperature of -8°C (18°F), with highs reaching up to 12°C (53°F) and lows dropping to around -27°C (-16°F).
JanFebMarAprMayJunJulAugSepOctNovDec171628354657666354372818
Data source: Temperature data for Sheridan 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 Sheridan

In Sheridan in December, the precipitation amount is 27 mm (1.1 in) accumulated over 7 days.

December Precipitation Trends in Sheridan

The chart displays monthly precipitation patterns in Sheridan, 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 Sheridan, December typically receives around 27 mm (1.1 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec194632567876242934432927
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Sheridan

In Sheridan in December humidity is 94%. With an average temperature of -8°C (18°F), this humidity feels like an icy weight on your skin, making every breath a struggle and turning every moment outdoors into a test of endurance for travelers.

December Average Humidity in Sheridan

This chart illustrates the average monthly humidity levels in Sheridan, 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 Sheridan is approximately 94%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec93%92%90%83%79%76%74%69%67%72%89%94%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Sheridan

In Sheridan 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 Sheridan, you can visit Hourly UV Index in Sheridan.

Maximum UV Index Levels in Sheridan for December

The chart shows the monthly maximum UV Index (UVI) for Sheridan 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 Sheridan typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579101110108642
Data source: Sheridan 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 Sheridan Compares to Other Months

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

This table compares monthly weather conditions in Sheridan, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-8°C (17°F)19 mm (0.7 inches)93%moderate
February Weather-9°C (16°F)46 mm (1.8 inches)92%moderate
March Weather-2°C (28°F)32 mm (1.3 inches)89%high
April Weather2°C (35°F)56 mm (2.2 inches)83%very high
May Weather8°C (47°F)78 mm (3.1 inches)79%very high
June Weather14°C (57°F)75 mm (3.0 inches)76%extreme
July Weather19°C (66°F)24 mm (0.9 inches)74%very high
August Weather17°C (64°F)29 mm (1.1 inches)69%very high
September Weather12°C (54°F)34 mm (1.3 inches)67%very high
October Weather3°C (38°F)43 mm (1.7 inches)72%high
November Weather-2°C (28°F)29 mm (1.1 inches)89%moderate
December Weather-8°C (18°F)27 mm (1.1 inches)94%low

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