Negros Oriental has a tropical climate. Because of the mountain range running from the north to the south, the province has two types of climatic conditions. The eastern part of the province is characterized by unpronounced maximum rainfall with a short dry season lasting from one to three months. The western half of the province is characterized by a distinct wet season and dry season. Also because of the mountain range, the province is sheltered from the full impact of typhoons originating from the southwest. However, the northern part of the province (from Canlaon City to La Libertad) is in the path of typhoons from the east.

Source: http://en.wikipedia.org/wiki/Negros_Oriental