Porto Monthly Climate

Porto has a Mediterranean climate with significant Atlantic influences, resulting in mild temperatures year-round and considerable rainfall. The city experiences warm summers and mild winters, with maritime effects moderating temperature extremes. The weather is characterized by more precipitation than other Portuguese cities due to its northern location.

Don't forget to check WhereWeather Website for weather statistics on your exact travel dates, for any city in the world. You can also compare different cities and dates side-by-side.

Temperature Overview

Average Daytime Temperature: 19°C (66°F)
Average Nighttime Temperature: 12°C (54°F)

Rainfall Statistics

Annual average daily rainfall: 3.2 mm (0.126 inches) per day
Rainiest month: December with around 5.8 mm (0.228 inches) per day
Driest month: July with around 0.6 mm (0.024 inches) per day
Average number of rainy days per year: 147 days

Monthly Weather Conditions

Temperature

Precipitation

Seasonal Breakdown

December-February (Winter)

Highs: 14-15°C (57-59°F)
Lows: 6-6°C (43-43°F)
Rainy Days: 13-15 days per month
Average Precipitation: 5.2 mm/day
Mild but wet with frequent rainfall

March-May (Spring)

Highs: 17-21°C (63-70°F)
Lows: 8-12°C (46-54°F)
Rainy Days: 10-12 days per month
Average Precipitation: 3.3 mm/day
Pleasant temperatures with decreasing rainfall

June-August (Summer)

Highs: 24-26°C (75-79°F)
Lows: 14-16°C (57-61°F)
Rainy Days: 3-6 days per month
Average Precipitation: 0.9 mm/day
Warm and relatively dry with occasional fog

September-November (Autumn)

Highs: 17-24°C (63-75°F)
Lows: 9-14°C (48-57°F)
Rainy Days: 8-14 days per month
Average Precipitation: 3.7 mm/day
Mild with increasing rainfall

Best Time to Visit

The best time to visit Porto is during late spring (May to June) and early autumn (September to October) when temperatures are pleasant and rainfall is moderate. However, each season offers unique experiences:

Winter (December-February) brings mild temperatures but frequent rainfall. While this is low season, it's perfect for exploring Porto's famous port wine cellars, museums, and enjoying traditional Portuguese cuisine. The city's beautiful architecture and cozy cafes are particularly atmospheric in winter light.

Spring (March-May) sees gradually warming temperatures and decreasing rainfall. This is an excellent time for sightseeing, exploring the historic Ribeira district, and enjoying outdoor cafes. The famous São João Festival in June marks the beginning of summer celebrations.

Summer (June-August) offers warm temperatures and the least rainfall of the year. While this is peak tourist season, morning fog (common in early summer) often clears to reveal sunny afternoons. The warm evenings are perfect for outdoor dining and riverside walks. Beach trips to nearby coastal areas are popular during this time.

Autumn (September-November) brings pleasant temperatures and fewer tourists. Early autumn maintains summer-like conditions perfect for outdoor activities, while late autumn sees more rainfall but remains mild. This is an ideal time for wine tourism, as it coincides with the grape harvest in the Douro Valley.

Before you go ahead and plan your next visit, make sure to check the weather forecast for your exact travel dates on WhereWeather Website. You can also compare different cities and dates side-by-side.