WanderWhen

Singapore weather in September

September is a challenging month to visit Singapore — consider April & June–February instead. Expect highs around 30°C, lows near 26°C, and about 21.8 days with rain.

4.8 · Poortravel score for September
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Avg high
30°C
Avg low
26°C
Rainfall
192 mm
Rain days
21.8
Sunshine
9.4 h/day
Daylight
12 h

What to pack for Singapore in September

  • light, breathable clothing
  • sun protection (hat, SPF 50)
  • a compact umbrella or rain shell — rain is frequent
  • expect humid, sticky conditions

Humidity averages 81%; max daily wind around 18 km/h.

How September compares

January: 5.1/10 JFebruary: 4.8/10 FMarch: 4.4/10 MApril: 4.6/10 AMay: 4.5/10 MJune: 4.9/10 JJuly: 4.9/10 JAugust: 5.0/10 ASeptember: 4.8/10 SOctober: 4.7/10 ONovember: 4.8/10 NDecember: 5.0/10 D

Best months in Singapore: April & June–February. See the full best time to visit Singapore guide.

Singapore in September: the details

In September, Singapore sees average daytime highs of 30°C (85°F) and overnight lows of 26°C (78°F). Rainfall totals roughly 192 mm across 21.8 rainy days, and the sun shines about 9.4 hours per day with 12 hours of daylight mid-month. Relative humidity averages 81%.

These figures are climate normals computed from the ERA5 weather reanalysis (2019–2024) for Singapore, Singapore (1.29, 103.85) — see our methodology. Actual conditions vary year to year.

Where should you go next month?

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