In September, the average high-temperature is practically the same as in August - a still warm 24.1°C (75.4°F). Among our chosen destinations (see below), the average temperatures you'll face in September would be between 18.6°C and 26.2°C, with exceptional possible peaks as low as 6°C and high as … On average, the recorded minimum temperature is 72°F. In particular, May, June and September may have the the most desirable weather, with little rainfall. September sees the weather in Lisbon remain extremely warm. What's the weather like in Lisbon in September. Temperature. The average temperature still reaches a high of 26°C (that's about 79°F), and never dips any lower than 17°C (about 63°F). The mean September temperature is 72°F (22.2°C), the sea water's 66°F (18.9°C), and the sky is primarily clear. 8:02 am WET The climate quite comfortable there september. You will see several days, at … Sweltering temperatures are commonplace. The weather in september in Portimao is dry ; it hardly ever rains (0.6in of precipitation over 2 days). September weather forecast for Lisbon, Portugal. Rainfall In Porto, Portugal, during 8 rainfall days, 71.9mm (2.8") of precipitation is typically accumulated. Expect big crowds in the Algarve and coastal resort areas. September Weather on the Azores & Madeira Islands: Average Temperature, Rainfall, Sunshine and Humidity The tables below list the normal September temperatures and rainfall on Portugal… September is a great time to be hanging around the city's miradouros (viewpoints). May is lovely in Portugal. ... Porto, Porto, Portugal Monthly Weather. Get the monthly weather forecast for Lisbon, Lisboa, Portugal, including daily high/low, historical averages, to help you plan ahead. In September, weather conditions in Portugal make it a good trip destination. This is Portugal before the summer heat and crowds, and the first time in the year that visiting the beach is a viable option. Here is a selection of travel guides: Thus, the mean temperature average on this month of september in Portimao is 76°F. Average temperatures across the country are a very pleasant 24°C and, with 14 hours of sunshine per day, you’ll have plenty of time to enjoy the top sights and the beaches. July and August usually see high temperatures, and sometimes a stifling heat. Warmer ocean temperatures. Are you planning a holiday with hopefully nice weather to the Algarve in September 2020? Weather.com brings you the most accurate monthly weather forecast for with average/record and high/low temperatures, precipitation and more. Accommodation prices increase 30%. Shoulder (Apr–Jun & Sep–Nov) Wildflowers and mild days are ideal for hikes and outdoor activities. In September, the average low-temperature is 14.7°C (58.5°F). 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