Singapore Weather in September

September weather

September feels hot, sticky and often cloudy. The high reaches 30°C and the low stays around 25°C, with humidity at 83%. Rain falls on 23 days, so showers can interrupt a walk through Chinatown or the Botanic Gardens. August is wetter, while October gets more rain.

You can still sightsee between showers, and indoor stops such as the National Museum of Singapore work well on wet afternoons. For greenery, take a short walk in the Botanic Gardens rather than planning a long outdoor hike. Beaches at Sentosa are possible, but don't count on a reliably sunny beach day.

Events and crowds

The Mid-Autumn Festival often falls in September, though its date changes each year. Chinatown's lantern displays and mooncakes make a pleasant evening outing. The Singapore Grand Prix is also often held in September, but its schedule varies. When it's on, expect packed streets around Marina Bay and higher hotel prices nearby.

If you hate crowds, check the Grand Prix dates before choosing your stay. Outside major events, September is generally calmer than the December and June school-holiday periods. Prices can rise sharply around race weekend, but there's no single September pattern across the city.

Make rain work for you

Plan an outdoor visit to Gardens by the Bay around the forecast, then duck into the Flower Dome or Cloud Forest if showers arrive. Both conservatories give you a sheltered way to spend time among the plants. For a meal, head to Lau Pa Sat's hawker stalls; the covered market makes a rainy dinner easier.

Travelling with kids? Keep the Singapore Science Centre in Jurong on your wet-weather list, rather than relying on a full day outdoors.