Summit County (Park City)
December
Weather in Summit County for December 2025
Your guide to Summit County weather in December - trends and predictions
Summit County typically experiences moderate snowfall in December, with an average of 8 snowy days.
In general, the average temperature in Summit County at the beginning of December is 5.6 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of -0.9 °F by the end of December.
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Snow Forecast ❄️
Temperatures
More
23
Dry days
0
Rainy days
8
Snow days
2°/-6°
Temperatures
9 km/h
Avg max wind
79 %
Avg humidity
Summit County Weather December
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| Sun. | Mon. | Tue. | Wed. | Thu. | Fri. | Sat. |
|---|---|---|---|---|---|---|
| 1  5° | 2 7° | 3  6° | 4 7° | 5 6° | 6 4° | |
| 7 4° | 8  1° | 9 -6° | 10 -2° | 11 2° | 12 1° | 13 -1° |
| 14  2° | 15  -1° | 16 3° | 17  0° | 18 3° | 19 6° | 20 6° |
| 21 7° | 22 1° | 23  1° | 24 2° | 25 1° | 26 -2° | 27  0° |
| 28  -1° | 29 1° | 30 0° | 31 -5° |
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Temperatures trend during December in Summit County
See the weather trend as well as the moving average line
December weather day by day
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| Date | Weather | Temperatures | Rain | Snow | More |
|---|---|---|---|---|---|
| Dec. 1 | Sunny | 5° /-7° | 0 mm | 0 cm | |
| Dec. 2 | Sunny | 7° /-4° | 0 mm | 0 cm | |
| Dec. 3 | Partly cloudy | 6° /-4° | 0 mm | 0 cm | |
| Dec. 4 | Sunny | 7° /-3° | 0 mm | 0 cm | |
| Dec. 5 | Sunny | 6° /-3° | 0 mm | 0 cm | |
| Dec. 6 | Sunny | 4° /-4° | 0 mm | 0 cm | |
| Dec. 7 | Sunny | 4° /-4° | 0 mm | 0 cm | |
| Dec. 8 | Overcast | 1° /-4° | 0 mm | 0 cm | |
| Dec. 9 | Overcast | -6° /-10° | 0 mm | 0 cm | |
| Dec. 10 | Overcast | -2° /-9° | 0 mm | 0 cm | |
| Dec. 11 | Partly cloudy | 2° /-10° | 0 mm | 0 cm | |
| Dec. 12 | Overcast | 1° /-5° | 0 mm | 0 cm | |
| Dec. 13 | Overcast | -1° /-7° | 0 mm | 0 cm | |
| Dec. 14 | Moderate or heavy snow showers | 2° /-7° | 25 mm | 1.2 cm | |
| Dec. 15 | Heavy snow | -1° /-8° | 25.2 mm | 18.2 cm | |
| Dec. 16 | Partly cloudy | 3° /-12° | 0 mm | 0 cm | |
| Dec. 17 | Mist | 0° /-7° | 0 mm | 0 cm | |
| Dec. 18 | Partly cloudy | 3° /-8° | 0 mm | 0 cm | |
| Dec. 19 | Sunny | 6° /-6° | 0 mm | 0 cm | |
| Dec. 20 | Sunny | 6° /-4° | 0 mm | 0 cm | |
| Dec. 21 | Overcast | 7° /-2° | 0 mm | 0 cm | |
| Dec. 22 | Overcast | 1° /-2° | 0 mm | 0 cm | |
| Dec. 23 | Freezing fog | 1° /-1° | 0 mm | 0 cm | |
| Dec. 24 | Overcast | 2° /-5° | 0 mm | 0 cm | |
| Dec. 25 | Freezing fog | 1° /0° | 7.7 mm | 5.6 cm | |
| Dec. 26 | Moderate or heavy snow showers | -2° /-5° | 21.8 mm | 15.7 cm | |
| Dec. 27 | Moderate or heavy snow with thunder | 0° /-4° | 22.6 mm | 16.3 cm | |
| Dec. 28 | Moderate snow | -1° /-7° | 7.7 mm | 5.6 cm | |
| Dec. 29 | Moderate snow | 1° /0° | 22.7 mm | 16.4 cm | |
| Dec. 30 | Moderate snow | 0° /-14° | 25.7 mm | 13.9 cm | |
| Dec. 31 | Overcast | -5° /-14° | 0 mm | 0 cm | |
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Important Notice
Our weather forecast for Summit 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 Summit County forecast closer to your planned date for the most up-to-date weather information.
Summit County in December - FAQ
What are the expected maximum and minimum temperatures in Summit County during December?
Brace for cold days with temperatures not exceeding 2° and nights that are likely to be freezing. Winter clothing is essential for comfort and safety.
How much rainfall should be expected in Summit County during December?
Significant rainfall exceeding 158.3 mm is expected in Summit County during December, occurring over more than 0 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Summit County in December 2025?
Summit County experiences an average snowfall of 92.8 cm during December, occurring over 8 days.
What are the typical wind conditions in Summit County during December?
The average wind speed in Summit County during December is 9 km/h, suggesting breezy to windy conditions, depending on your activities.
Summit County snow forecast December 2025
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December rainfall patterns in Summit County
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Where is Summit County?Get accurate weather forecasts for Summit County, located at latitude 40.646 and longitude -111.498. Stay updated with localized weather information tailored for Summit County.
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