Subseasonal Weather Outlook (1 – 15 September 2019)

Issued 2 September 2019
Valid for weeks 1 and 2: 1 September – 15 September


Figure 1: Rainfall Outlook

Figure 2: Temperature Outlook


With the Indian Ocean Dipole (IOD) expected to remain in the positive phase, drier-than-usual conditions are forecast to persist over many parts of the southern ASEAN region, including Sumatra, Kalimantan and the Java Sea areas.

For the northern ASEAN region, above-average rainfall is forecast over the central and southern parts of the Mekong sub-region, as well as over the Philippines in Week 1.

During the first fortnight of September 2019, warmer conditions are expected over much of equatorial 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.