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.

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Check the conditions for any month of the year.

• January
• February
• March
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• May
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• September
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• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Boulder's climate page.

Boulder Temperature in December

Min Temperature -7°C (19°F)  

Max Temperature 7°C (45°F)  

Chance of Rain 23%  

Precipitation 32 mm (1.3 in)  

Rainy days 7 days  

Humidity 56% *  

Sunshine 195 hours *  

Percentage Sunshine 67% *  

* Data from: Denver, the United States of America (45 KM, 28 Miles).

What to Wear in Boulder in December

Dress warmly and in layers for your trip to Boulder in December. A good base layer system works wonders. Start with good thermal underwear, add something warm like a fleece sweater, then finish with a waterproof jacket on top. Light rain is possible, so consider bringing a small umbrella or rain jacket. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.

What To Do in Boulder in December

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

5/10

Cycling

4/10

Walking

4/10

Camping

2/10

Outdoor sports

4/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Boulder's climate page.

More climate data for Boulder

Temperature Rainfall Sunshine Humidity

See the full Boulder climate overview or explore weather in the United States of America.