Tibet Weather

Tibet has the following characteristics in weather.
1.Stronge and longtime sunshine because of thin and clean air. Lhasa, for example, has 3005 hours of sunshine in the whole year.
2.Low pressure and small air density
3.Cool summer and cold winter in the plateau, temperature quickly decreases with elevation. The temperature difference is great in a day.
4.Distinct rainy and windy reasons in the plateau. The rainy reason is from June to September, while the windy season from November to the May of next year. The strongest winds always happen in Feburary or March.