Singapore Weather in September
Thinking of visiting Singapore in September? Expect very high temperatures reaching 30°C (86°F) during the day, dropping to 26°C (79°F) at night. Heavy showers are common during the rainy season.
Rainfall in Singapore in September
As part of the rainy season, Singapore sees around 15 days of rain in September, with an average of 176 mm (6.9 in). The rainy season here brings regular, substantial showers. It's worth being prepared for rain on most days you're out.
Temperature in Singapore in September
Daytime temperatures in Singapore reach 30°C (86°F) in September, dropping to 26°C (79°F) at night. The hottest part of the day is usually in the afternoon, so lighter clothing can help you stay comfortable. With lows around 26°C (79°F), the nights are warm enough that a sheet is usually all you need for bedding.
Sunshine in Singapore in September
The city usually sees around 156 hours of sunlight, indicating a moderately sunny period (despite it being part of rainy season).
Wind Speed in Singapore in September
Average wind conditions reach 1 m/s (2 knots) in September. This creates generally peaceful weather with subtle air movement. Remember this is an average: some days are windless while others have noticeable or very gentle breezes.
Average water temperature in September
The water temperature is 28°C (82°F), which most people find very comfortable. A good month for swimming and water sports.If your ideal day consists of dry skies and pleasant temperatures, January, February, August and September typically offer the best circumstances for Singapore.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Singapore, check out our Singapore's climate page.
Singapore Temperature in September
Min Temperature
26°C (79°F)
Max Temperature
30°C (86°F)
Water Temperature
28°C (82°F)
Chance of Rain
48%
Precipitation
176 mm (6.9 in)
Rainy days
15 days
Humidity
83%
Windspeed
1 m/s (2 knots)
Sunshine
156 hours
Percentage Sunshine
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Singapore typically stay consistent throughout September, with daily highs averaging around 30°C (86°F). Nights are warm, with lows around 25°C (77°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Singapore in September
Browse day-by-day weather records for Singapore spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Singapore historical weather extremes in September
According to our 38 years of weather records for Singapore, the following extremes were recorded between 1987 and 2025.
- The hottest September day on record in Singapore reached 34°C (93°F) (September 1, 1999).
- On September 5, 2020, Singapore saw its coldest September day with temperatures maxing out at 26°C (79°F).
- The lowest overnight temperature recorded in September was 21°C (70°F) (September 15, 1990).
Best Places in Singapore in September
Find out more about the weather in Singapore and which places have the best travel conditions in this month. See all of Singapore in September →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Singapore in September
Warm temperatures in September make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Heavy rain is guaranteed, please bring a good poncho and waterproof everything! Expect water temperatures of around 28°C (82°F), which is ideal for taking a refreshing dip. Bring swimwear and consider packing a towel for drying off. Sunglasses could come in handy during the sunnier parts of your trip.What To Do in Singapore in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Singapore, check out our Singapore's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Singapore climate overview or explore weather in Singapore.
