Hotter still is the core. In the sun this is thought to be 10 - 20 million degrees. These temperatures are due to the pressure caused by gravity trying to compress the star. It has to be this temperature for fusion of hydrogen to take place. Once fusion starts in a young star this adds to the temperature to ensure that fusion continues.
Weather in Lisbon in September. The average maximum daytime temperature in Lisbon in September is a warm 27Â°C (81Â°F) with low heat & humidity. There are usually 9 hours of bright sunshine each day, which represents 68% of the 12 hours of daylight. The average sea temperature in and around Lisbon in September is 19Â°C (66Â°F). Expect 26mm (1.0 inches) of rainfall across the whole of September with 6 days with some rain falling. Maximum UV levels will be high (6 UV index) at midday when the skies are clear.
Summers are warm to hot and sunny with average daytime temperatures of 27â35 Â°C (81â95 Â°F). The weather in the autumn and winter months is generally mild with temperatures around 8â17 Â°C (46â63 Â°F). Faro receives most of its rainfall over the winter months; rain is very rare between June and September.The annual average temperature is around 17 Â°C (63 Â°F) - 18 Â°C (64 Â°F) and the annual rainfall is around 500 mm (19.69 in).The average sea surface temperature is 15â16 Â°C (59â61 Â°F) in January rising to 22â25 Â°C (72â77 Â°F) in August.ËfaÉ¾u]) is a municipality, southernmost city and seat of the district of the same name, in the Algarve region of southern Portugal. With a population of 64,560 inhabitants in 2011 (with 50,000 inhabitants in the city proper), the municipality covers an area of approximately 202.57 square kilometres (78.21 sq mi).