December weather forecast
Wyoming, USA

December in Wyoming solidifies the arrival of winter, featuring cold temperatures and significant snowfall. Average low temperatures plummet to between 10°F (-12.2°C) and 20°F (-6.7°C) across various regions, and average high temperatures can stay between 30°F (-1.1°C) and 40°F (4.4°C) in the plains. In the highlands, temperatures often peak between 25°F (-3.9°C) and 35°F (1.7°C). Snowfall intensifies, particularly in higher elevations, adding to the already significant accumulations.

December's climate contrasts sharply with that of November, offering colder temperatures and longer nights. Winds continue to move across the plains, often carrying frigid air and snowflakes, adding to the wintry atmosphere. Snow and ice dominate the landscape, rendering most trails and outdoor areas accessible only to those equipped for winter conditions. While general tourist activity is low, December attracts winter sports enthusiasts keen on activities like skiing, snowboarding, and snowshoeing. With snow-covered landscapes and holiday festivities, Wyoming transforms into a winter wonderland, albeit one that requires proper preparation and caution due to extreme weather conditions.

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• Cheyenne - December »
  In Cheyenne, during December, snow falls for 9.6 days and regularly aggregates up to 2.8" (71mm) of snow. In Cheyenne, during December, the rain falls for 5.5 days and regularly aggregates up to 0.59" (15mm) of precipitation.
• Casper - December »
  In Casper, Wyoming, in December, during 4.1 rainfall days, 0.51" (13mm) of precipitation is typically accumulated. In Casper in December, it is raining for 4.1 days, with typically 0.51" (13mm) of accumulated precipitation.
• Laramie - December »
  In Laramie in December, snow falls for 8.8 days, with typically accumulated 3.46" (88mm) of snow. The months with the lowest UV index in Laramie are January through April, October through December, with an average maximum UV index of 2.
• Gillette - December »
  The month with the shortest days in Gillette is December, with an average of 8h and 54min of daylight. In Gillette, Wyoming, during December, the rain falls for 1.8 days and regularly aggregates up to 0.43" (11mm) of precipitation.
• Rock Springs - December »
  In Rock Springs, Wyoming, in December, during 13.5 snowfall days, 4.37" (111mm) of snow is typically accumulated. With an average of 9h and 12min of daylight, December has the shortest days of the year in Rock Springs, Wyoming.
• Sheridan - December »
  The month with the least rainfall in Sheridan is December, when the rain falls for 7.8 days and typically collects 0.75" (19mm) of precipitation. In Sheridan in December, during 13.6 snowfall days, 4.41" (112mm) of snow is typically accumulated.
• Green River - December »
  In Green River in December, snow falls for 13.5 days, with typically accumulated 4.37" (111mm) of snow. In Green River during December, the rain falls for 4.7 days and regularly aggregates up to 0.71" (18mm) of precipitation.
• Evanston - December »
  In Evanston in December, during 15.5 snowfall days, 8.74" (222mm) of snow is typically accumulated. In Evanston in December, during 7.1 rainfall days, 1.14" (29mm) of precipitation is typically accumulated.
• Riverton - December »
  In Riverton in December, snow falls for 6.7 days, with typically accumulated 2.24" (57mm) of snow. In Riverton, the month of December registers the lowest temperatures, averaging 30.9°F (-0.6°C) at the peak and 14.7°F (-9.6°C) at the lowest.
• Jackson - December »
  In Jackson in December, during 4.2 rainfall days, 2.91" (74mm) of precipitation is typically accumulated. In Jackson, during December, snow falls for 23.7 days and regularly aggregates up to 24.72" (628mm) of snow.
• Cody - December »
  January and December are months with the least rain in Cody when the rain falls for 5.9 days and typically aggregates up to 0.28" (7mm) of rain. January and December are months with the least rain in Cody when the rain falls for 5.9 days and typically aggregates up to 0.28" (7mm) of rain.
• Rawlins - December »
  The month with the shortest days in Rawlins is December, with an average of 9h and 12min of daylight. In Rawlins, Wyoming, in December, during 4.6 rainfall days, 0.79" (20mm) of precipitation is typically accumulated.