December weather forecast
Wyoming, USA

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Flag of Wyoming, USA

Weather in December

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.

  • Cheyenne - December »
    In Cheyenne in December, snow falls for 9.6 days, with typically accumulated 2.8" (71mm) of snow. December has the shortest days of the year with an average of 9h and 18min of daylight.
  • Casper - December »
    With an average of 9h and 6min of daylight, December has the shortest days of the year in Casper, Wyoming. The month with the shortest days in Casper is December, with an average of 9h and 6min of daylight.
  • Laramie - December »
    In Laramie during December, the rain falls for 3.2 days and regularly aggregates up to 0.51" (13mm) of precipitation. With an average of 9h and 18min of daylight, December has the shortest days of the year in Laramie, Wyoming.
  • Gillette - December »
    In Gillette during December, snow falls for 6.2 days and regularly aggregates up to 1.81" (46mm) of snow. In Gillette 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 in December, during 13.5 snowfall days, 4.37" (111mm) of snow is typically accumulated. January and December, with an average of 5.9h of sunshine, are months with the least sunshine in Rock Springs, Wyoming.
  • Sheridan - December »
    The month with the least rainfall in Sheridan, Wyoming, is December, when the rain falls for 7.8 days and typically collects 0.75" (19mm) of precipitation. In Sheridan, Wyoming, during December, the rain falls for 7.8 days and regularly aggregates up to 0.75" (19mm) of precipitation.
  • Green River - December »
    In Green River, Wyoming, in December, during 13.5 snowfall days, 4.37" (111mm) of snow is typically accumulated. The coldest time of the year in Green River is December, with temperatures averaging a high of 25.7°F (-3.5°C) and a low of 11.5°F (-11.4°C).
  • Evanston - December »
    In Evanston, in December, during 15.5 snowfall days, 8.74" (222mm) of snow is typically accumulated. In Evanston in December, it is raining for 7.1 days, with typically 1.14" (29mm) of accumulated precipitation.
  • Riverton - December »
    In Riverton during December, snow falls for 6.7 days and regularly aggregates up to 2.24" (57mm) of snow. December has the shortest days of the year in Riverton with an average of 9h and 6min of daylight.
  • Jackson - December »
    In Jackson in December, during 23.7 snowfall days, 24.72" (628mm) of snow 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 »
    December is the coldest month of the year in Cody registering average temperatures as high as 29.3°F (-1.5°C) and as low as 15.1°F (-9.4°C). December has the shortest days of the year in Cody with an average of 8h and 54min of daylight.
  • Rawlins - December »
    In Rawlins during December, snow falls for 13.6 days and regularly aggregates up to 4.76" (121mm) of snow. In Rawlins, Wyoming, during December, the rain falls for 4.6 days and regularly aggregates up to 0.79" (20mm) of precipitation.
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Wyoming, USA

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