After a two-week stay in Paris, we flew to Porto, Portugal, the second largest city after Lisbon, the capital of Portugal. We stayed for four full days. We rented two airbnb, two bedrooms, two baths, and one bedroom and one bath. Both the units have A/C and overlooking the Douro river which runs thru the city. Porto is a typical European old city but bubbling with tourism. The weather at end of August was very ideal and pleasant with temperature in the low 80s and no humidity. Rain season starts in December. Summer months can be much warmer. The exchange rate is $1.14USD = One Euro.