San Juan County (Silverton)
December
Weather in San Juan County, Colorado for December 2025
Your guide to San Juan County weather in December - trends and predictions
San Juan County typically experiences moderate snowfall in December, with an average of 6 snowy days.
In general, the average temperature in San Juan County at the beginning of December is -0.9 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of -5.4 °F by the end of December.
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Snow Forecast ❄️
Temperatures
More
22
Dry days
3
Rainy days
6
Snow days
-3°/-12°
Temperatures
10 km/h
Avg max wind
62 %
Avg humidity
San Juan County Weather December
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Temperatures trend during December in San Juan County
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December weather in San Juan County day by day
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| Date | Weather | Temperatures | Rain | Snow | More |
|---|---|---|---|---|---|
| Dec. 1 |  Sunny | -1° /-9° | 0 mm | 0 cm | |
| Dec. 2 | Sunny | 0° /-9° | 0 mm | 0 cm | |
| Dec. 3 |  Overcast | 0° /-8° | 0 mm | 0 cm | |
| Dec. 4 | Overcast | 0° /-9° | 0 mm | 0 cm | |
| Dec. 5 |  Cloudy | -2° /-11° | 0 mm | 0 cm | |
| Dec. 6 |  Partly cloudy | -1° /-9° | 0 mm | 0 cm | |
| Dec. 7 | Cloudy | -2° /-10° | 0 mm | 0 cm | |
| Dec. 8 | Sunny | -1° /-10° | 0 mm | 0 cm | |
| Dec. 9 |  Moderate or heavy snow showers | -12° /-18° | 10.1 mm | 6.3 cm | |
| Dec. 10 | Overcast | -14° /-20° | 0 mm | 0 cm | |
| Dec. 11 | Sunny | -1° /-15° | 0 mm | 0 cm | |
| Dec. 12 | Cloudy | -2° /-12° | 0 mm | 0 cm | |
| Dec. 13 |  Light freezing rain | -9° /-16° | 1 mm | 0 cm | |
| Dec. 14 | Light freezing rain | 0° /-16° | 0.2 mm | 0 cm | |
| Dec. 15 | Light freezing rain | -5° /-13° | 0.1 mm | 0 cm | |
| Dec. 16 | Cloudy | -1° /-13° | 0 mm | 0 cm | |
| Dec. 17 | Overcast | -3° /-12° | 0 mm | 0 cm | |
| Dec. 18 | Sunny | 0° /-12° | 0 mm | 0 cm | |
| Dec. 19 | Partly cloudy | 0° /-7° | 0 mm | 0 cm | |
| Dec. 20 | Sunny | 1° /-6° | 0 mm | 0 cm | |
| Dec. 21 | Sunny | 2° /-5° | 0 mm | 0 cm | |
| Dec. 22 | Cloudy | 0° /-7° | 0 mm | 0 cm | |
| Dec. 23 | Cloudy | -3° /-10° | 0.6 mm | 0 cm | |
| Dec. 24 | Cloudy | 0° /-9° | 0 mm | 0 cm | |
| Dec. 25 | Moderate or heavy snow showers | -5° /-10° | 21.3 mm | 13.2 cm | |
| Dec. 26 |  Patchy moderate snow | -5° /-16° | 2.2 mm | 0.9 cm | |
| Dec. 27 | Patchy moderate snow | -7° /-12° | 12.8 mm | 7.5 cm | |
| Dec. 28 | Light freezing rain | -6° /-13° | 1 mm | 0.4 cm | |
| Dec. 29 | Overcast | -1° /-9° | 0.4 mm | 0 cm | |
| Dec. 30 | Patchy moderate snow | -6° /-15° | 3 mm | 0.8 cm | |
| Dec. 31 | Partly cloudy | -8° /-15° | 0 mm | 0 cm | |
| Next | |||||
Important Notice
Our weather forecast for San Juan County 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 San Juan County forecast closer to your planned date for the most up-to-date weather information.
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San Juan County in December - FAQ
What are the expected maximum and minimum temperatures in San Juan County during December?
Brace for cold days with temperatures not exceeding -3° and nights that are likely to be freezing. Winter clothing is essential for comfort and safety.
How much rainfall should be expected in San Juan County during December?
Moderate rainfall is anticipated in San Juan County during December, with a total of 52.7 mm spread over approximately 3 days. Considering plans for rainy days is advisable.
Will it snow in San Juan County in December 2025?
San Juan County experiences an average snowfall of 29 cm during December, occurring over 6 days.
What are the typical wind conditions in San Juan County during December?
The average wind speed in San Juan County during December is 10 km/h, suggesting breezy to windy conditions, depending on your activities.
San Juan County snow forecast December 2025
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December rainfall patterns in San Juan County
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Where is San Juan County?Get accurate weather forecasts for San Juan County, located at latitude 37.812 and longitude -107.665. Stay updated with localized weather information tailored for San Juan County.
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