Porto Weather in December
December in Porto sees daytime temperatures around 15°C (59°F) and lows of 9°C (48°F) at night. With around 160 mm (6.3 in) of rainfall expected, it's worth packing a rain jacket.
Rainfall in Porto in December
Historically, December sees about 16 days of rain, with a monthly average of 160 mm (6.3 in). Wet weather is a regular and significant part of this month. Frequent days of rain combined with high totals means proper waterproofs are worth packing.
Temperature in Porto in December
Temperatures in Porto in December top out at 15°C (59°F) and drop to 9°C (48°F) overnight. The winter season takes place during December. A light jacket or extra layer can be useful, especially outside the warmest hours of the day. With lows around 9°C (48°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.
Sunshine in Porto in December
The area enjoys a moderate level of sunlight, with around 124 hours. It's a good balance between sunny and cloudy days.
Wind Speed in Porto in December
Average wind conditions reach 5 m/s (10 knots) in December. This creates lively weather with fresh winds that make small trees sway noticeably. Remember this is an average: some days are less windy while others have particularly active windy conditions.
Average water temperature in December
The water is 14°C (57°F) this month — cool enough to feel refreshing on a warm day, but cold enough that most people won't stay in for long without a wetsuit.December in Porto can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options 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 Portugal, check out our Porto's climate page.
Porto Temperature in December
Min Temperature
9°C (48°F)
Max Temperature
15°C (59°F)
Water Temperature
14°C (57°F)
Chance of Rain
53%
Precipitation
160 mm (6.3 in)
Rainy days
16 days
Humidity
81%
Windspeed
5 m/s (10 knots)
Sunshine
124 hours
Percentage Sunshine
46%
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Porto typically stay consistent throughout December, with daily highs averaging around 15°C (59°F). Nights are cold, with lows typically ranging from 7°C (45°F) to 9°C (48°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 Porto in December
Browse day-by-day weather records for Porto spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Porto historical weather extremes in December
The extremes listed below come from historical weather data collected in Porto from 1976 through 2025.
- On December 2, 1985, temperatures climbed to 24°C (75°F), marking the warmest December day on record.
- On December 27, 2008, Porto saw its coldest December day with temperatures maxing out at 8°C (46°F).
- The coldest night in December in Porto was on December 30, 2014, with a minimum of -2°C (28°F).
- The wettest December day on record brought 77 mm (3 in) of precipitation to Porto (December 14, 2012).
Best Places in Portugal in December
Find out more about the weather in Portugal and which places have the best travel conditions in this month. See all of Portugal in December →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Porto in December
Pack for changing conditions in Porto in December. Bring a mix of short and long sleeves, a warm layer like a hoodie or light jacket, and comfortable pants. The key is being able to add or remove layers as the days goes by. Heavy rain is guaranteed, please bring a good poncho and waterproof everything! Expect water temperatures of around 14°C (57°F), which is definitely too cold for comfortable swimming. Your luggage space is better used for other items. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.What To Do in Porto 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 Portugal, check out our Porto's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Porto climate overview or explore weather in Portugal.
