Though there is no autumn, trees in Singapore do shed leaves during brief dry spells (especially in February). The and Sea Almond Tree show leaf color changes, though not dramatic. Flowering often peaks in April and October (inter-monsoon), with the Yellow Flame and Trumpet Tree blooming spectacularly for 1–2 weeks, mimicking a "spring."

The most dreaded "season" is (August–October during El Niño years), when PSI (Pollutant Standards Index) reaches hazardous levels.