Greater Bandung is included in the area with a monsoon rainfall pattern, with the peak of the rainy season in the DJF period and the peak of the dry season in the JJA period. Based on the forecasts made by BMKG, the 2021 dry season for Greater Bandung area will fall in the third month of May. However, until May Basis III, rainfall analysis conducted by the Bandung Geophysics Station showed that the previous three consecutive rainfalls had still reached 92 mm (> 50 mm). Greater Bandung area has just entered the dry season in the third decade of June. An investigation into the causes of the delay in the dry season in the Greater Bandung area was carried out, using a descriptive qualitative approach. By using rainfall observation data from rain posts scattered in the Greater Bandung area as well as SST, RH, and MJO model data released by ECMWF, NOAA, and BoM Australia, it is known that the cause of the delay at the beginning of the dry season is caused by interacting global and regional factors. With local factors in the Greater Bandung area.

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