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.
Lisbon weather text for Sun 18 th October. The Lisbon weather is going to be moderate or heavy rain shower. Lisbon visibility is going to be around 7 km i.e. 4 miles and an atmospheric pressure of 1008 mb. The daytime temperature is going to reach 23 Â°c and the temperature is going to dip to 17 Â°c at night.t looks on Tuesday, 20 October the Lisbon weather is going to be light rain shower. The visibility is going to be around 10 km i.e. 6 miles and an atmospheric pressure of 1014 mb. The daytime temperature is going to reach 24 Â°c and the temperature is going to dip to 17 Â°c at night.