Ascona Weather in December
With daytime temperatures of 5°C (41°F) and nighttime lows of -3°C (27°F), December in Ascona brings low temperatures during the day. Do keep in mind that quite a bit of snow/rainfall is typical. Around 91 mm (3.6 in) falls on average.
Rainfall in Ascona in December
Historically, approximately 12 days this month are expected to have snow/rain, averaging 91 mm (3.6 in). When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.
Temperature in Ascona in December
If you're visiting Ascona in December, expect highs of 5°C (41°F) and overnight lows around -3°C (27°F). Winter occurs in December. Cold conditions tend to persist from morning through evening, so be prepared for winter weather. Nights are well below freezing at -3°C (27°F). An extra blanket is a good idea if you feel the cold, especially in older or less well-heated accommodation. As one of the coldest months, it's important to layer up to stay warm. Don't let the chill catch you off-guard.
Sunshine in Ascona in December
The area enjoys a moderate level of sunlight, with around 121 hours. It's a good balance between sunny and cloudy days.
Wind Speed in Ascona in December
Wind speeds average 1 m/s (2 knots) during December. At this speed, you'll experience mostly light air movement that's just barely noticeable. As an average, some days will be completely calm while others have gentle breezes you can feel on your skin.December in Ascona has its charm. However, if you're seeking pleasant, dry and sunny weather, our weather planner can help you explore other destinations in the world.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Switzerland, check out our Ascona's climate page.
Ascona Temperature in December
Min Temperature
-3°C (27°F)
Max Temperature
5°C (41°F)
Chance of Rain
41%
Precipitation
91 mm (3.6 in)
Rainy days
12 days
Humidity
75% *
Windspeed
1 m/s (2 knots) *
Sunshine
121 hours *
Percentage Sunshine
57% *
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Ascona typically stay consistent throughout December, with daily highs averaging around 5°C (41°F). Nights are very cold, with lows around 0°C (32°F).
Average temperatures in December
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in December
Historical weather for Ascona in December
Browse day-by-day weather records for Ascona spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Ascona historical weather extremes in December
The extremes listed below come from historical weather data collected in Ascona from 1976 through 2025.
- The warmest day in December was on December 23, 2023, with a maximum of 21°C (70°F).
- The coldest December day was on December 28, 1996, with a maximum of -3°C (27°F).
- Nighttime temperatures dropped to -13°C (9°F) on December 30, 1996, marking the coldest December night on record.
Best Places in Switzerland in December
Find out more about the weather in Switzerland and which places have the best travel conditions in this month. See all of Switzerland in December →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Ascona in December
Cold weather calls for smart layering in December. A thermal base layer makes a huge difference in staying warm. Add a wool sweater or fleece, then a wind-resistant outer jacket. Prepare for significant rainfall with proper waterproof clothing and shoes. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.What To Do in Ascona in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Switzerland, check out our Ascona's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed
See the full Ascona climate overview or explore weather in Switzerland.
