Verdict: Fair month
Singapore Weather in September
September runs warm in Singapore, with daily highs around 30°C (86°F) and nights near 24°C (75°F). It's also the wet side of the calendar: rain falls on about 26 days, so build flexibility into plans. September is workable in Singapore if your dates are fixed — just plan around the conditions.
Average high
30°C / 86°F
Average low
24°C / 75°F
Rain days
~26
Precipitation
276 mm
What to pack for Singapore in September
- Light, breathable clothing — linen and technical fabrics earn their keep
- High-SPF sunscreen, sunglasses, and a refillable water bottle
- Rain gear is non-negotiable — expect rain on roughly 26 days
- Quick-dry shoes — downpours are short but heavy
- Comfortable walking shoes — every guide on this site assumes you'll use them
September against the rest of the year
Warmest in Singapore: Mar (31°C / 88°F) · Coolest: Jan (29°C / 84°F) · Wettest: Dec (~29 rain days)
29°
23°
Jan
30°
24°
Feb
31°
24°
Mar
30°
24°
Apr
30°
25°
May
29°
25°
Jun
30°
25°
Jul
29°
24°
Aug
30°
24°
Sep
30°
24°
Oct
30°
24°
Nov
30°
24°
Dec
Daily highs / lows in °C · bars show rain days per month · ERA5 climate normals (2020–2024)