Subseasonal Weather Outlook (16 – 31 August 2019)

Issued 18 August 2019
Valid for weeks 3 and 4: 16 August – 31 August


Figure 1: Rainfall Outlook

Figure 2: Temperature Outlook


In the northern ASEAN region, the third week of August 2019 is expected to be drier-than-usual except for the northern parts of the Mekong sub-region. In the last week of the month, near-average rainfall is expected for the region. In the southern ASEAN region, drier-than-usual conditions are forecast over Singapore, southern Peninsular Malaysia and many areas in Indonesia during the fortnight. The drier conditions in the southern ASEAN region can be partly attributed to the influence of the Indian Ocean Dipole (IOD) in the positive phase.

During the second fortnight of August 2019, warmer conditions are expected over many parts of the ASEAN region.

The outlook is assessed for the region in general. For specific updates on the national scale, the relevant ASEAN National Meteorological and Hydrological Services should be consulted.