Like the lanscape, East Java' s climate is derived, depending upon attitude. The plains and lower hill regions are hot and humid, making conditions ideal for wet rice cultivation (sawah). Further up in the hills the air becomes quite cool, while in high mountainous areas at night the temperature can drop to near zero. Hill regions are well suited for the cultivation of a large variety of fruits and vegetables, which thrive in the colder climate. Principal crops, aside from rice, include corn tobacco, sugar cane, coffee, rubber, kapok, cloves, tea, cocoa, peanuts, soybeans and cotton. In addition, there are extensive plantations of teak and pine. East Java has a market wet and dry season, with rain occurring between October and April. The wettest mothn are December, January and February.