What is the weather like in Singapore in September?

Expect temperatures between 25°C and 29°C with 65% average rain probability and about 8 hours of sunshine daily.

What is the weather like in Singapore in September?

Singapore in September scores 55/100 based on 30 years of climate data. Worthwhile timing with some trade-offs.

Who should visit Singapore in September?

September in Singapore is ideal for: Business travelers.

Singapore Weather in September | 30-Year Forecast

Avg High

29°C

Hottest around day 23

Avg Low

25°C

Coolest around day 29

Rainy Days

30days

65% avg rain chance

Sunshine

8hrs/day

Autumn season

Sea Temperature in September

Singapore Strait

29.8°C

Monthly Average

Water Feel

🌴Tropical

Perfect for swimming and water sports

Swim Rating

✅Excellent for swimming

Based on average sea surface temperature

Body of Water

Singapore Strait

Singapore coastline

Essential Travel Info for Singapore

🗓️ Best Time to Visit 📖 Travel Guide 🍴 Food Guide

Currency

SGD

$ Singapore dollar

Language

English

+3 more

Driving

Left side

Connect

The international telephone country code...

Safety

Very High Safety

GPI: 1.326

Travel Intelligence

Exclusive flight analytics & health data for Singapore

Smart Flight Estimator

Airport-to-Airport Logistics

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Flight Connectivity Analysis

Airport traffic data & seasonal patterns

Major Hub

100/ 100

Traffic Index

Extremely busy airport

Peak Daily Arrivals

slots per day

Peak

Dec

Low

May

Monthly Traffic Distribution

512

Jan

523

Feb

514

Mar

491

Apr

471

May

1791

Jun

1732

Jul

1703

Aug

1763

Sep

1728

Oct

1833

Nov

1841

Dec

Traffic Level

Low Season

Key Connections

Kuala Lumpur (KUL)

Jakarta Soekarno-Hatta (CGK)

Bangkok Suvarnabhumi (BKK)

Denpasar-Bali Island Ngurah Rai (Bali) (DPS)

Hong Kong Chek Lap Kok (HKG)

Health & Safety Advisory

CDC travel health recommendations

7 Recommendations

COVID-19

All eligible travelers should be up to date with their COVID-19 vaccines. Please seeYour COVID-19 Vaccinationfor more information.

Hepatitis A

Recommended for unvaccinated travelers one year old or older going to Singapore.Infants 6 to 11 months old should also be vaccinated against Hepatitis A. The dose does not count toward the routine 2-dose series.Travelers allergic to a vaccine component should receive a single dose of immune globulin, which provides effective protection for up to 2 months depending on dosage given.Unvaccinated travelers who are over 40 years old, are immunocompromised, or have chronic medical conditions planning to depart to a risk area in less than 2 weeks should get the initial dose of vaccine and at the same appointment receive immune globulin.

Hepatitis B

Recommended for unvaccinated travelers younger than 60 years old traveling to Singapore. Unvaccinated travelers 60 years and older may get vaccinated before traveling to Singapore.

Measles

Cases of measles are on the rise worldwide. Travelers are at risk of measles if they have not been fully vaccinated at least two weeks prior to departure, or have not had measles in the past, and travel internationally to areas where measles is spreading.All international travelers should be fully vaccinated against measles with the measles-mumps-rubella (MMR) vaccine, including an early dose for infants 6–11 months, according toCDC’s measles vaccination recommendations for international travel.

Rabies

Dogs infected with rabies are not commonly found in Singapore.If rabies exposures occur while in Singapore, rabies vaccines are typically available throughout most of the country.Rabies pre-exposure vaccination considerations include whether travelers 1) will be performing occupational or recreational activities that increase risk for exposure to potentially rabid animals and 2) might have difficulty getting prompt access to safe post-exposure prophylaxis.Please consult with a healthcare provider to determine whether you should receive pre-exposure vaccination before travel.For more information, seecountry rabies status assessments.

Typhoid

Recommended for most travelers, especially those staying with friends or relatives or visiting smaller cities or rural areas.

+1 more

Source: CDC Travelers' Health

View Complete Health Guide

Is September a Good Time to Visit Singapore?

👌Worthwhile timing with some trade-offs(55/100)

Short Answer

September falls in Singapore's wet season: 65% rain probability with average 5mm rainfall. Pack waterproofs and plan flexible indoor alternatives.

Decision Factors

Oppressive heat and humidity

29°C with 85% humidity - challenging conditions

High rainfall period

65% rain probability, 5.2mm average

Vaccinations required

Yellow Fever

Feels significantly hotter than 29°C

Heat index: 36°C due to 85% humidity

Warm tropical seas

29.8°C sea temperature - Hot Soup

Peak tourist season

96% of annual peak - expect crowds and peak prices

Good For

💼
Business travelers
Climate-controlled meetings unaffected by weather

Who Should Avoid

💰
Budget travelers
Peak season means premium prices everywhere
👴
Elderly travelers
Heat index of 36°C poses health risks
🥾
Outdoor enthusiasts
65% rain probability disrupts outdoor activities
📸
Photographers
80% cloud cover limits natural light opportunities

"According to 30YearWeather's analysis of 30 years of NASA POWER satellite data,Singapore in September averages 29°C with 65% precipitation probability."

📊 Source: 30YearWeather.com🛰️ Data: NASA POWER (1991-2021)View Methodology →

Frequently Asked Questions: Singapore in September

What are the temperatures in Singapore in September?

Daytime highs average 29°C, nights drop to 25°C. Temperatures remain fairly consistent.

How many rainy days in Singapore in September?

Expect around 30 days with measurable rainfall. Definitely pack rain gear.

What to wear in Singapore in September?

Light, breathable fabrics. Don't forget sunglasses and a hat.

Is September peak season in Singapore?

This is off-peak season. Expect lower prices and fewer crowds.

Singapore Weather in September