What is the weather like in Bangkok in September?

Expect temperatures between 25°C and 31°C with 76% average rain probability and about 8 hours of sunshine daily.

What is the weather like in Bangkok in September?

Bangkok in September scores 53/100 based on 30 years of climate data. Good option with minor considerations.

Who should visit Bangkok in September?

September in Bangkok is ideal for: Business travelers.

Bangkok Weather in September | 30-Year Forecast

Avg High

31°C

Hottest around day 1

Avg Low

25°C

Coolest around day 23

Rainy Days

30days

76% avg rain chance

Sunshine

8hrs/day

Autumn season

Essential Travel Info for Bangkok

🗓️ Best Time to Visit 📖 Travel Guide 🍴 Food Guide

Currency

THB

฿ Thai baht

Language

Thai

Driving

Left side

Connect

Prepaid SIM cards for tourists are readi...

Safety

Moderate Safety

GPI: 2.098

Travel Intelligence

Exclusive flight analytics & health data for Bangkok

Smart Flight Estimator

Airport-to-Airport Logistics

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Flight Connectivity Analysis

Airport traffic data & seasonal patterns

Well Connected

77/ 100

Traffic Index

Popular destination

Peak Daily Arrivals

slots per day

Peak

Feb

Low

Sep

Monthly Traffic Distribution

533

Jan

557

Feb

540

Mar

496

Apr

489

May

476

Jun

500

Jul

486

Aug

459

Sep

487

Oct

515

Nov

524

Dec

Traffic Level

Low Season

Key Connections

Phuket (HKT)

Chiangmai Chiang Mai (CNX)

Na Thon (Ko Samui Island) Samui (USM)

Hong Kong Chek Lap Kok (HKG)

Singapore Changi (SIN)

Health & Safety Advisory

CDC travel health recommendations

11 Recommendations

COVID-19

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

Chikungunya

There iselevated chikungunya riskin Thailand.Chikungunya vaccinationmay be considered for people traveling or moving to this location if they are planning to stay for an extended period of time (for example, 6 months or more).

Cholera

There is no longer active cholera transmission and vaccine is not recommended.

Hepatitis A

Recommended for unvaccinated travelers one year old or older going to Thailand.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 Thailand. Unvaccinated travelers 60 years and older may get vaccinated before traveling to Thailand.

Japanese Encephalitis

Recommended for travelers whoAre moving to an area with Japanese encephalitis to liveSpend long periods of time, such as a month or more, in areas with Japanese encephalitisFrequently travel to areas with Japanese encephalitisConsider vaccination for travelersSpending less than a month in areas with Japanese encephalitis but will be doing activities that increase risk of infection, such as visiting rural areas, hiking or camping, or staying in places without air conditioning, screens, or bed netsGoing to areas with Japanese encephalitis who are uncertain of their activities or how long they will be thereNot recommended for travelers planning short-term travel to urban areas or travel to areas with no clear Japanese encephalitis season.

+5 more

Source: CDC Travelers' Health

View Complete Health Guide

Is September a Good Time to Visit Bangkok?

👌Good option with minor considerations(53/100)

Short Answer

Bangkok in September tests even seasoned travelers: 31°C daytime temperatures and 83% humidity mean early mornings or evenings are your best windows for sightseeing.

Decision Factors

Oppressive heat and humidity

30.9°C with 83% humidity - challenging conditions

High rainfall period

76% rain probability, 7mm average

Vaccinations required

Yellow Fever

Feels significantly hotter than 30.9°C

Heat index: 42°C due to 83% humidity

Health precautions needed

Be aware of: Leptospirosis, Melioidosis, Dengue

Plenty of sunshine

8h of sunshine daily

Good For

💼
Business travelers
Climate-controlled meetings unaffected by weather

Who Should Avoid

👨‍👩‍👧‍👦
Families with children
42°C heat index dangerous for children
👴
Elderly travelers
Heat index of 42°C poses health risks
🥾
Outdoor enthusiasts
76% rain probability disrupts outdoor activities
📸
Photographers
89% cloud cover limits natural light opportunities

"According to 30YearWeather's analysis of 30 years of NASA POWER satellite data,Bangkok in September averages 31°C with 76% precipitation probability."

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

Frequently Asked Questions: Bangkok in September

What are the temperatures in Bangkok in September?

Daytime highs average 31°C, nights drop to 25°C. Temperatures remain fairly consistent.

How many rainy days in Bangkok in September?

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

What to wear in Bangkok in September?

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

Is September peak season in Bangkok?

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

Bangkok Weather in September

Bangkok September Weather Calendar