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December Weather in Green River, United States

Last updated: June 24, 2025

In December, the average temperature in Green River, United States hovers around -6°C (22°F), with a chilling minimum of -22°C (-7°F) and a warm maximum of 14°C (58°F). Expect 22 mm (0.9 in) of precipitation spread over 7 days, contributing to an average humidity of a brisk 90%. Stay prepared for the frosty conditions!

December Temperature in Green River

In December in Green River, the average temperature is -6°C (22°F). Maximums can reach 14°C (58°F) and minimums can be as low as -22°C (-7°F). Be prepared for a wide range of temperatures and pack accordingly for your travels.

December Weather in Green River: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Green River, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Green River, December typically has an average temperature of -6°C (22°F), with highs reaching up to 14°C (58°F) and lows dropping to around -22°C (-7°F).
JanFebMarAprMayJunJulAugSepOctNovDec192131425266747161443422
Data source: Temperature data for Green River 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 Green River

In Green River in December, the precipitation amount is 22 mm (0.9 in) over the course of 7 days.

December Precipitation Trends in Green River

The chart displays monthly precipitation patterns in Green River, 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 Green River, December typically receives around 22 mm (0.9 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec24244138441571119212322
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Green River

In Green River in December, humidity is 90%. With an average temperature of -6°C (22°F), this humidity feels like a biting chill that seeps into your bones, making travel uncomfortable and necessitating extra layers to stay warm while navigating through the damp, frosty air.

December Average Humidity in Green River

This chart illustrates the average monthly humidity levels in Green River, 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 Green River is approximately 90%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec92%93%85%73%64%57%45%41%50%70%84%90%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Green River

In Green River 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 Green River, you can check the information here.

Maximum UV Index Levels in Green River for December

The chart shows the monthly maximum UV Index (UVI) for Green River 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 Green River typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46710111212119743
Data source: Green River 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 Green River Compares to Other Months

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

This table compares monthly weather conditions in Green River, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-7°C (19°F)24 mm (0.9 inches)92%moderate
February Weather-6°C (22°F)24 mm (1.0 inches)93%high
March Weather0°C (32°F)41 mm (1.6 inches)85%high
April Weather5°C (42°F)38 mm (1.5 inches)73%very high
May Weather11°C (53°F)44 mm (1.7 inches)64%extreme
June Weather19°C (66°F)15 mm (0.6 inches)57%extreme
July Weather23°C (74°F)7 mm (0.3 inches)45%extreme
August Weather22°C (72°F)11 mm (0.4 inches)41%extreme
September Weather16°C (62°F)19 mm (0.7 inches)50%very high
October Weather7°C (44°F)21 mm (0.8 inches)70%high
November Weather1°C (34°F)23 mm (0.9 inches)84%moderate
December Weather-6°C (22°F)22 mm (0.9 inches)90%moderate

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