Thermopolis Weather in December

December in Thermopolis typically sees daytime highs of 1°C (34°F) and nighttime lows of -13°C (9°F). Expect some snow/rainfall during the month. It falls within the winter season.

Rainfall in Thermopolis in December

Looking at the last 30 years, the data shows about 7 days with snow/rain, averaging 19 mm (0.7 in) for the month. Rain days are few and the total is low, so this is a largely dry month. Any showers that do occur tend to be brief.

Temperature in Thermopolis in December

December in Thermopolis sees highs of 1°C (34°F) and lows of -13°C (9°F) overnight. December marks the winter season. Time outdoors is usually more comfortable with proper winter clothing and protection from wind. With overnight lows of -13°C (9°F), temperatures fall below freezing at night. An extra thick blanket can make a real difference if your accommodation runs cold. Typically, it's the chilliest month of the year. Ensure you're prepared by packing appropriate winter gear.

If you prefer dry days with pleasant temperatures, December may not be the ideal month to visit Thermopolis. Our weather planner can help you explore destinations with more pleasant weather conditions.