San Marino Weather in December
Thinking of visiting San Marino in December? Expect low temperatures reaching 10°C (50°F) during the day, dropping to 4°C (39°F) at night, and note that quite a bit of rainfall is likely.
Rainfall in San Marino in December
On average, there are about 12 days with rain during this month, averaging 87 mm (3.4 in). When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.
Temperature in San Marino in December
December in San Marino sees highs of 10°C (50°F) and lows of 4°C (39°F) overnight. The month of December belongs to the winter season. Cold conditions persist throughout the day, so warm clothing is important from the moment you head outside. At 4°C (39°F) overnight, it gets properly cold after dark. On the bright side, cold nights tend to make for excellent sleeping conditions.
Sunshine in San Marino in December
The month is characterized by fewer sunny days, with roughly 75 hours hours of sunshine. Ideal for those who prefer a cooler, cloudier climate.
Average water temperature in December
The water temperature is 14°C (57°F) — chilly, but perfectly fine for a swim if you're not too sensitive to cold water. A short wetsuit can make longer sessions more comfortable.December in San Marino 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 San Marino, check out our San Marino's climate page.
San Marino Temperature in December
Min Temperature
4°C (39°F)
Max Temperature
10°C (50°F)
Water Temperature
14°C (57°F) *
Chance of Rain
41%
Precipitation
87 mm (3.4 in)
Rainy days
12 days
Humidity
84% *
Sunshine
75 hours *
Percentage Sunshine
30% *
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in San Marino typically stay consistent throughout December, with daily highs averaging around 10°C (50°F). Nights are cold, with lows typically ranging from 1°C (34°F) to 4°C (39°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 San Marino in December
Browse day-by-day weather records for San Marino spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
San Marino historical weather extremes in December
Based on 49 years of weather observations in San Marino between 1976 and 2025, these are the recorded extremes.
- San Marino recorded its highest December temperature of 22°C (72°F) on December 17, 1989.
- The coldest December day was on December 20, 2009, with a maximum of -4°C (25°F).
- The lowest overnight temperature recorded in December was -11°C (12°F) (December 19, 2010).
Best Places in San Marino in December
Find out more about the weather in San Marino and which places have the best travel conditions in this month. See all of San Marino in December →
perfect weather
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tolerable
unpleasant
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What to Wear in San Marino in December
The weather can be unpredictable in December, so pack clothes you can easily mix and match. You could bring jeans, other long pants, and a few t-shirts. A light jacket or light sweater will be pleasant for the cooler moments. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. With water temperatures around 14°C (57°F), the water is quite cold for swimming. You can skip the swimwear unless you're particularly tough. With limited sunshine expected, sunglasses aren't a priority for packing.What To Do in San Marino 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 San Marino, check out our San Marino's climate page.
Temperature Rainfall Sunshine Humidity Water Temp
See the full San Marino climate overview or explore weather in San Marino.
