Two inter-monsoon periods prevail from April to May and November to December. The annual rainfall is generally high. In 1994 the annual total rainfall was 2,653.5 mm. February to April is virtually a drought period. However, well-defined seasons have not been outlined due to unstable climatic influences.
Air temperature is relatively uniform throughout the year.
The drought months of March and April are the warmest. Due to high temperature and rainfall, humidity is high throughout the year. Although Brunei is not directly in the path of tropical storms, cyclones and typhoons that pass through the South China Sea, it is heavily affected by tides. The non-oil coastal resources are relatively lightly exploited. Therefore Brunei is in a favourable position to promote and execute a sustainable development plan.