Olhão Weather in December
In Olhão, December brings moderate daytime temperatures around 17°C (63°F), with nights cooling to 12°C (54°F). It is the wettest month of the year, so expect more rainfall than usual.
Rainfall in Olhão in December
With the most rainfall occurring this month, it's practical to keep an umbrella handy for sudden downpours. Looking at the last 30 years, the data shows about 12 days with rain, averaging 89 mm (3.5 in) for the month. 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 Olhão in December
December in Olhão brings moderate temperatures, with highs of 17°C (63°F) and nights around 12°C (54°F). Experience the winter season in December. This creates a mild day-to-night pattern that is generally easy to manage with the right clothing. Nights drop to around 12°C (54°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.
Sunshine in Olhão in December
The area enjoys a balanced 158 hours of sunlight, ensuring it's neither too overcast nor too sunny.
Wind Speed in Olhão in December
Wind speeds average 3 m/s (6 knots) during December. At this speed, light breezes keep leaves and small twigs in gentle motion while the wind also provides natural cooling. Since this is an average, some days are more tranquil while others have more persistent light winds that are more noticeable.
Average water temperature in December
The water temperature is 16°C (61°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 Olhão has its charm, but if you're looking for destinations with pleasant temperatures and sunny skies, 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 Olhão's climate page.
Olhão Temperature in December
Min Temperature
12°C (54°F)
Max Temperature
17°C (63°F)
Water Temperature
16°C (61°F) *
Chance of Rain
41%
Precipitation
89 mm (3.5 in)
Rainy days
12 days
Humidity
77% *
Windspeed
3 m/s (6 knots) *
Sunshine
158 hours *
Percentage Sunshine
53% *
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Olhão typically stay consistent throughout December, with daily highs averaging around 17°C (63°F). Nights are cool, with lows around 10°C (50°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 Olhão in December
Browse day-by-day weather records for Olhão spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Olhão historical weather extremes in December
The extremes listed below come from historical weather data collected in Olhão from 1976 through 2025.
- On December 11, 1976, temperatures climbed to 24°C (75°F), marking the warmest December day on record.
- Olhão experienced its chilliest December day on December 21, 1979, reaching only 9°C (48°F).
- Olhão registered its coldest December night on December 22, 1979, with temperatures dropping to -1°C (30°F).
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 Olhão in December
Pleasant temperatures in December mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Prepare for significant rainfall with proper waterproof clothing and shoes. With water temperatures around 16°C (61°F), the water is quite cold for swimming. You can skip the swimwear unless you're particularly tough. Bring sunglasses since you'll have some sunny periods throughout the monthWhat To Do in Olhão 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 Olhão's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Olhão climate overview or explore weather in Portugal.
