[2026] What are the characteristics of Thailand's climate and what to wear? Compare the difference with Japan

Thailand is a tropical country, warm and humid all year round. There is rainfall throughout the year, divided into wet and dry seasons. The climate in Thailand varies from region to region, but basically light clothing that can withstand the heat is required.

In this article, I will explain the characteristics of Thailand's climate, recommended clothing, and differences from Japan.

[Average temperature in Thailand]

What are the characteristics of Thailand's climate and what to wear? Compare the difference with Japan

Climate features of Thailand

Thailand belongs to the tropical climate, so the climate is hot and humid all year round. April to June are the hottest months, with temperatures often exceeding 40°C. On the other hand, it is relatively cool from November to February, sometimes dropping below 10 degrees in the north.

May to October is the arrival of the monsoon season. Heavy rains can occur, especially from September to October. This season requires caution, especially in the southern coastal areas. Overall, Thailand is hot all year round, so it is recommended to travel in light clothing. During the rainy season, it's a good idea to bring waterproof gear such as a raincoat or folding umbrella.

Thai climate in spring (March to May)

Springtime in Thailand (March to May) is the season of high humidity. Daytime temperatures can exceed 30°C and sometimes approach 40°C. At night, it cools down to around 20°C, but the high humidity makes it hot and humid.

The best clothes for this season are thin, breathable materials that keep you dry even when you sweat. Shirts made of cotton or linen, T-shirts, and short-sleeved polo shirts are recommended. Also, bring a light long-sleeved shirt or cardigan to avoid getting sick in the air conditioning.

Light and breathable shorts and shorts are ideal for bottoms. Skirts and pants that are long enough to cover your knees are also good. Don't forget to bring a hat, sunglasses, and sun cream to protect yourself from UV rays.

If you want to know more, you can refer to this article.

Thailand summer climate (June to August)

Summer in Thailand (June-August) can be very hot and humid. Light, breathable and quick-drying clothing is best due to the high temperatures. Cotton T-shirts, shorts, and cool dresses are good.

UV protection items such as hats, sunglasses, and sunscreen are also essential. For outdoor activities, it is recommended to wear a wet towel around your neck and bring a water bottle.

If you want to know more, you can refer to this article.

Autumn Thailand climate (September to November)

Thailand's climate in autumn is cooler and often enters the dry season. Especially in November, the temperature drops considerably and becomes pleasant. However, it is still hot during the day, so light long-sleeved shirts, cardigans, and jeans are best.

It gets a little chilly at night, so it's best to wear a haori or a light jacket. Also, it can get a little chilly in the early morning and at night, so when traveling to Thailand in autumn, it is necessary to take measures against the cold.

If you want to know more, you can refer to this article.

Winter climate in Thailand (December to February)

Thailand's winter climate is cool and comfortable during the dry season. During the period from December to February, the average temperature is around 20°C to 30°C, and the humidity is low, making it comfortable to spend. It can be cool at night, so a light jacket or sweater will keep you comfortable.

The sun is strong on sunny days, and even the winter sun can make you feel hot, so it is recommended that you bring UV-blocking clothing, a hat, and sunglasses. For your feet, light sneakers or sandals that you are used to wearing are recommended.

If you want to know more, you can refer to this article.

Average temperature in Bangkok, Chiang Mai and Phuket in Thailand

Annual temperature in Bangkok

Bangkok belongs to the tropical monsoon climate, and the climate is hot all year round. The average temperature is about 28°C throughout the year, and the maximum temperature can reach over 35°C.

Especially from March to May, the maximum temperature can reach 40℃ or higher, so it is necessary to take appropriate measures to ensure a comfortable trip.

Annual temperature in Chiang Mai

Chiang Mai belongs to a mountainous climate, with relatively low temperatures throughout the year. The average temperature is around 25°C throughout the year, but it can drop to around 15°C at night. On the other hand, the temperature rises from March to May, and the maximum temperature can exceed 30°C.

Chiang Mai has a large temperature difference between day and night, so it is recommended to bring a jacket such as a long sleeve or a jacket.

Annual temperature in Phuket

Phuket belongs to a tropical climate. The temperature is high throughout the year, with an average temperature of around 28°C. Especially from March to May, the highest temperature can reach 35℃ or more, and it is often hot and humid.

On the other hand, during the rainy season from May to October, heavy rain can fall in a short amount of time in a single day, so we recommend bringing a raincoat or folding umbrella in case of sudden rain.

Precipitation in Bangkok, Chiang Mai and Phuket in Thailand

[Precipitation in Thailand]

Precipitation in Bangkok

The average annual rainfall in Bangkok is around 1,500 mm, with September being the wettest month. Despite the intermittent showers, precipitation in Bangkok is vital for maintaining the city's lush vegetation, cooling down the scorching temperatures, and replenishing the Chao Phraya River, a lifeline for the city's inhabitants.

Precipitation in Chiang Mai

Chiang Mai is blessed with an average annual precipitation of around 1,100 mm. The wet season stretches from May to October, with July and August being the rainiest months. During this time, heavy showers and occasional thunderstorms are common, contributing significantly to the total rainfall. The remaining months, particularly November to April, form the dry season when precipitation is considerably lower.

Despite the rainy season, Chiang Mai's abundant water supply creates a lush and vibrant environment throughout the year.

Precipitation in Phuket

Phuket experiences a tropical monsoon climate, resulting in high annual precipitation. The island receives an average of 2,200 mm(87 inches) of rainfall per year, with the wettest months being from May to October. The southwest monsoon brings heavy showers and thunderstorms during this period, while the northeast monsoon brings drier weather from November to April.

Despite the rainy season, Phuket's lush greenery and vibrant landscapes thrive as a result of its abundant precipitation.

Understand the climate of Thailand and go on a trip!

Thailand is a country full of attractions such as beautiful nature, historical cultural heritage, and delicious Thai food. It is also famous as a Japanophile country, and everyone from first-timers to veterans of overseas trips will be satisfied.

Why don't you go to Thailand on your next overseas trip? Trip.com sells great deals on Thailand travel tickets. If you are interested, please check it out.