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Weather in Boulder for December 2025

Your guide to Boulder weather in December - trends and predictions

    Temperatures

  • In general, the average temperature in Boulder at the beginning of December is 8.7 °F. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 5.9 °F by the end of December.

  • Rain 🌧️

  • Precipitation in Boulder during December is a rare event, with an average of fewer than 2 rainy days.

  • More

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Average dry days
31
Dry days
Average rainy days
0
Rainy days
Average snowy days
0
Snow days
Average temperatures
7°/-2°
Temperatures
Average wind speed
20 km/h
Avg max wind
Average humidity
46 %
Avg humidity

Boulder Weather December

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Temperatures trend during December in Boulder

See the weather trend as well as the moving average line

December weather day by day

Click on a date for more information
Date Weather Temperatures Rain UV More
Dec. 1 Sunny
Sunny
8° /0° 0 mm 3
Dec. 2 Sunny
Sunny
7° /-3° 0 mm 3
Dec. 3 Sunny
Sunny
11° /-2° 0 mm 4
Dec. 4 Sunny
Sunny
6° /-1° 0 mm 3
Dec. 5 Partly cloudy
Partly cloudy
8° /-1° 0 mm 3
Dec. 6 Sunny
Sunny
9° /-2° 0 mm 3
Dec. 7 Sunny
Sunny
12° /-1° 0 mm 4
Dec. 8 Overcast
Overcast
9° /1° 0 mm 2
Dec. 9 Cloudy
Cloudy
1° /-7° 0 mm 1
Dec. 10 Sunny
Sunny
-3° /-8° 0 mm 2
Dec. 11 Patchy rain possible
Patchy rain possible
4° /-7° 0.1 mm 1
Dec. 12 Overcast
Overcast
6° /-2° 0 mm 2
Dec. 13 Overcast
Overcast
5° /0° 0 mm 1
Dec. 14 Sunny
Sunny
11° /0° 0 mm 4
Dec. 15 Sunny
Sunny
8° /-1° 0 mm 3
Dec. 16 Sunny
Sunny
6° /-6° 0 mm 3
Dec. 17 Cloudy
Cloudy
6° /-1° 0 mm 2
Dec. 18 Overcast
Overcast
7° /-3° 0 mm 2
Dec. 19 Sunny
Sunny
7° /0° 0 mm 3
Dec. 20 Partly cloudy
Partly cloudy
12° /-1° 0 mm 4
Dec. 21 Sunny
Sunny
12° /4° 0 mm 4
Dec. 22 Overcast
Overcast
13° /3° 0 mm 3
Dec. 23 Partly cloudy
Partly cloudy
9° /2° 0 mm 3
Dec. 24 Overcast
Overcast
9° /0° 0 mm 2
Dec. 25 Overcast
Overcast
8° /0° 0 mm 2
Dec. 26 Cloudy
Cloudy
7° /-2° 0 mm 2
Dec. 27 Overcast
Overcast
6° /1° 0 mm 2
Dec. 28 Overcast
Overcast
5° /-2° 0 mm 2
Dec. 29 Cloudy
Cloudy
9° /1° 0 mm 2
Dec. 30 Cloudy
Cloudy
6° /-2° 0 mm 2
Dec. 31 Cloudy
Cloudy
0° /-6° 0 mm 1
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Important Notice
Our weather forecast for Boulder in December is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Boulder forecast closer to your planned date for the most up-to-date weather information.

Boulder in December - FAQ

What are the expected maximum and minimum temperatures in Boulder during December?
Prepare for cooler days with highs just around 7° and colder nights, dipping below -2°.
How much rainfall should be expected in Boulder during December?
Rainfall in Boulder during December is rare to nonexistent, with the total expected rainfall being less than 10 mm and approximately 0 days seeing any precipitation. Planning without the concern for rain is generally straightforward during this very dry period.
Will it snow in Boulder in December 2025?
Boulder typically sees 0 cm of snowfall during December.
What are the typical wind conditions in Boulder during December?
The average wind speed in Boulder during December is 20 km/h, suggesting breezy to windy conditions, depending on your activities.

December rainfall patterns in Boulder

Explore the daily rainfall trends and prepare for Boulders December weather 💧

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Location coordinates Where is Boulder?

Get accurate weather forecasts for Boulder, located at latitude 40.015 and longitude -105.271. Stay updated with localized weather information tailored for Boulder.

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