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.
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).he Faro city holiday is on 7 September. The students' festival (Semana Academica acadÃ©mica Da universidade Do), algarve organized every year by students from The university of The, algarve is also an important event In. faro