Grisons (St. Moritz)
December
Weather in Grisons for December 2025
Your guide to Grisons weather in December - trends and predictions
Expect heavy snowfall in Grisons during December, with an average of 20 snowy days.
In general, the average temperature in Grisons at the beginning of December is -1.9 °C. As the month progressed, temperatures tended to significantly warm up, reaching an average of 2 °C by the end of December.
Snow Forecast ❄️
Temperatures
11
Dry days
0
Rainy days
20
Snow days
0°/-12°
Temperatures
12 km/h
Avg max wind
77 %
Avg humidity
Grisons in December average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  2° | 2 1° | 3  -4° | 4  -6° | 5  -3° | 6  -2° | 7 -1° |
| 8 -4° | 9 -2° | 10 -2° | 11 -0° | 12  1° | 13  -1° | 14 -3° |
| 15 -5° | 16  2° | 17 4° | 18 3° | 19 2° | 20 -3° | 21 -2° |
| 22 -2° | 23 -5° | 24 -3° | 25 1° | 26  3° | 27 3° | 28 2° |
| 29 2° | 30 2° | 31 1° |
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Temperatures trend during December in Grisons
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 |
|---|---|---|---|---|---|
| 1 Dec. | Heavy snow | 2° /-8° | 32 mm | 27.2 cm | |
| 2 Dec. | Heavy snow | 1° /-15° | 21.5 mm | 18.2 cm | |
| 3 Dec. | Freezing fog | -4° /-20° | 1.1 mm | 0.8 cm | |
| 4 Dec. | Moderate snow | -6° /-18° | 0.4 mm | 0.3 cm | |
| 5 Dec. | Moderate or heavy snow showers | -3° /-16° | 0.6 mm | 0.5 cm | |
| 6 Dec. | Light snow | -2° /-17° | 2.9 mm | 2 cm | |
| 7 Dec. | Freezing fog | -1° /-19° | 0.8 mm | 0.5 cm | |
| 8 Dec. | Moderate snow | -4° /-13° | 4.3 mm | 3.1 cm | |
| 9 Dec. | Freezing fog | -2° /-12° | 1.9 mm | 1.5 cm | |
| 10 Dec. | Moderate or heavy snow showers | -2° /-13° | 2.6 mm | 2.2 cm | |
| 11 Dec. | Heavy snow | 0° /-9° | 4 mm | 3 cm | |
| 12 Dec. | Patchy moderate snow | 1° /-11° | 0.6 mm | 0.5 cm | |
| 13 Dec. | Moderate or heavy snow with thunder | -1° /-10° | 9.4 mm | 8 cm | |
| 14 Dec. | Moderate or heavy snow showers | -3° /-15° | 0.6 mm | 0.5 cm | |
| 15 Dec. | Moderate snow | -5° /-17° | 0.7 mm | 0.4 cm | |
| 16 Dec. | Sunny | 2° /-15° | 0 mm | 0 cm | |
| 17 Dec. | Sunny | 4° /-9° | 0 mm | 0 cm | |
| 18 Dec. | Sunny | 3° /-8° | 0 mm | 0 cm | |
| 19 Dec. | Sunny | 2° /-8° | 3.6 mm | 2.6 cm | |
| 20 Dec. | Light snow | -3° /-15° | 2.1 mm | 1.5 cm | |
| 21 Dec. | Heavy snow | -2° /-16° | 2.2 mm | 1.9 cm | |
| 22 Dec. | Moderate or heavy snow showers | -2° /-11° | 17.5 mm | 14 cm | |
| 23 Dec. | Light snow | -5° /-15° | 3.7 mm | 2.7 cm | |
| 24 Dec. | Sunny | -3° /-17° | 0.4 mm | 0.3 cm | |
| 25 Dec. | Freezing fog | 1° /-14° | 0 mm | 0 cm | |
| 26 Dec. | Partly cloudy | 3° /-12° | 0 mm | 0 cm | |
| 27 Dec. | Partly cloudy | 3° /-10° | 0 mm | 0 cm | |
| 28 Dec. | Partly cloudy | 2° /-10° | 0 mm | 0 cm | |
| 29 Dec. | Sunny | 2° /-11° | 0 mm | 0 cm | |
| 30 Dec. | Freezing fog | 2° /-11° | 0 mm | 0 cm | |
| 31 Dec. | Heavy snow | 1° /-10° | 4.6 mm | 3.8 cm | |
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Important Notice
Our weather forecast for Grisons 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 Grisons forecast closer to your planned date for the most up-to-date weather information.
Grisons in December - FAQ
What are the expected maximum and minimum temperatures in Grisons during December?
Brace for cold days with temperatures not exceeding 0° and nights that are likely to be freezing. Winter clothing is essential for comfort and safety.
How much rainfall should be expected in Grisons during December?
Significant rainfall exceeding 135 mm is expected in Grisons during December, occurring over more than 0 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Grisons in December 2025?
Grisons experiences an average snowfall of 111.85 cm during December, occurring over 20 days.
What are the typical wind conditions in Grisons during December?
The average wind speed in Grisons during December is 12 km/h, suggesting breezy to windy conditions, depending on your activities.
Grisons snow forecast December 2025
Track daily snowfall levels and discover Grisons’s snowy potential this December ❄️
December rainfall patterns in Grisons
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