Coimbra has a Mediterranean climate but often has the most rainfall during the winter season and the wettest in December, so though you will have the maximum holidays in the month of December, do not plan a Coimbra trip then. The best time to visit Coimbra is Spring time, when the hillsides are covered with flowers and the city is lit by the almond blossom.
The best months to visit are the months of May or October when the weather is absolutely perfect. Also, if you are a foodie, then you should definitely visit Coimbra in the month of April when they mix tradition and culture to celebrate “O Património Doceiro de Coimbra” (The Sweet Heritage of Coimbra), where the cakes and almonds are celebrated.
The summers in Coimbra: The city experiences summers from June to September, definitely the busiest time of the city as August is Portugal’s holiday month and the hottest month. The beaches and outdoor pools are loaded with people. The average weather goes up to 30 degrees Celsius. For sure the city looks livelier but remember, the beaches are over-crowded beaches and the rates are sky-high.
The winters in Coimbra: November to March is the winter season in Coimbra when the weather is cooler but Coimbra experiences rains as well. The average temperature around these months, is 15 degrees Celsius. The season is best avoided.
The spring in Coimbra: This season starts from the month of February, in this month the city looks a little prettier than usual. The flowers and almonds wrap the city up with beauty. This is perhaps, the best season to visit Coimbra.
The autumn in Coimbra: From October starts the autumn which is another excellent month to visit Coimbra, it is neither too hot nor too cold but yes, the beaches and pools are closed down as they are open only from beginning of June to mid-September.