Boulder Weather in December

Boulder in December sees low daytime temperatures of 7°C (45°F) and nighttime lows of -7°C (19°F). Moderate snow/rainfall is typical, with around 32 mm (1.3 in) for the month.

Rainfall in Boulder in December

On average, there are about 7 days with snow/rain during this month, averaging 32 mm (1.3 in). When rain does fall, showers tend to be light and brief. Most days will be dry.

Temperature in Boulder in December

Daytime temperatures in Boulder reach 7°C (45°F) in December, dropping to -7°C (19°F) at night. December is part of the winter season. Cold conditions persist throughout the day, so warm clothing is important from the moment you head outside. With lows of -7°C (19°F), nights are freezing. Packing a spare blanket is worth considering if you're staying somewhere that might not be fully heated. With temperatures often at their lowest, it is the coldest month of the year. Ideal for indoor activities, be sure to pack warm clothing.

Sunshine in Boulder in December

Expect a lot of sunshine this month, with about 195 hours of sun. These sunny conditions help offset the cool temperatures, making it a pleasant month to explore outdoors.

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