Singapore Weather In September 2024. Average daily temperatures during september remain steady, ranging from 25°c (77°f) to 31°c (87.8°f). Singapore weather in september 2024 expect 30°c daytime maximum temperatures in the shade with on average 5 hours of sunshine per day in singapore in september.
The region is influenced by two primary monsoon seasons: The calendar says its autumn, but the september weather in singapore says differently.