Type

Negros Oriental has two types of climatic conditions due to the mountain range running from north to south of Negros island. The whole eastern part of the province falls under the third type of climate which is characterized by not very pronounced maximum rainfall with a short dry season from one (1) to three (3) months. The other half falls under the first type, characterized by a distinct wet and dry season. A dry month is one wherein rainfall is less than two (2) inches.

Rainfall Distribution

Average Monthly Rainfall and Number of Rainy Days, 2002
Source: PAG-ASA, 2002

Temperature Ranges

The temperature for the entire province ranged from 21.50C, 22.80C and 23.70C in 2002. The maximum temperature reached to about 34.50C and this was recorded during the month of July. The minimum temperature recorded in the month of April is about 20.60C.

From June to September, the prevailing wind is southwest monsoon (“Habagat”). From November to February, the prevailing wind is the northeast monsoon (“Amihan”). The season for variable winds is from March to May.

Due to its geography, Negros Oriental rarely experiences the worst effects of typhoons. The high mountains shield the province from the full impact of the southwest monsoon. They also keep the local weather generally fair all year round. In some cases, when storms hit the Bicol region or Central Luzon in a northeasterly direction, storm signal No. 1 is raised for Negros Oriental. But sometimes these storms do not threaten the province at all. However, the northern part of the province, from Canlaon City to La Libertad, is within the path of typhoons coming from the Surigao-Samar direction.

Humidity is the degree of moisture content in the atmosphere. Relative humidity in the province range between 78% and 84%. Annual average humidity in the province is approximately 82%.