Highest temperature in Singapore on September 7?

What this question means

The most confident weather distribution on this board, and geography explains why. Singapore's high on 7 September peaks at 33°C with 68% — with 34°C at 21% and 32°C at 8% taking almost everything that remains.

Equatorial cities have remarkably little temperature variance. There is no meaningful seasonal swing, days are close to twelve hours year-round, and the ocean moderates everything. The practical result is that tomorrow tends to look like today, and a forecaster can put two-thirds of their confidence on a single degree.

Compare with the Wellington question elsewhere here, where the leading option takes only 39%. Same kind of question, same forecast horizon, half the confidence — because a maritime temperate climate in early spring genuinely can do several different things.

The tails tell the same story. Anything at 30°C or below, or 35°C and above, sits at 2% or less. Singapore in September does not really have unusual days.