Sun Valley Weather in December

With daytime temperatures of 0°C (32°F) and nighttime lows of -12°C (10°F), December in Sun Valley brings very low temperatures during the day. It is also the wettest month of the year, so pack an umbrella.

Rainfall in Sun Valley in December

This month sees the most rain, so carrying an umbrella will ensure you stay dry. Snow is expected on roughly 15 days, totalling around 80 mm (3.1 in) for the month. A fairly balanced picture this month, some wet days but nothing too extreme in terms of intensity.

Temperature in Sun Valley in December

If you're visiting Sun Valley in December, expect highs of 0°C (32°F) and overnight lows around -12°C (10°F). The month of December belongs to the winter season. Time outdoors is usually more comfortable with proper winter clothing and protection from wind. With overnight lows of -12°C (10°F), temperatures fall below freezing at night. An extra thick blanket can make a real difference if your accommodation runs cold. This month tends to bring the coldest weather of the year, so be sure to pack enough warm clothing to stay comfortable.

If you're looking for dry conditions and comfortable temperatures, December may not be the ideal month to visit Sun Valley. Our weather planner can help you explore destinations with more pleasant weather conditions.