The hottest month in Thailand 2024

Thailand is known for its year-round warmth, but it also has significant temperature fluctuations depending on the region, time of year, and even day-to-day weather patterns. If you’re an expat living here, understanding the country’s climate can make a big difference in how you plan your activities, especially during the hottest months. Here’s a breakdown of Thailand’s temperatures by region and a month-by-month look at when and where you can expect the most intense heat in 2024.

Year-round warmth and temperature fluctuations

Thailand’s climate generally falls into three seasons: hot, rainy, and cool. Although the ‘cool’ season doesn’t mean chilly weather, it’s more comfortable, with temperatures ranging from 20-30°C (68-86°F). For many, the rainy season (usually May to October) brings relief from the heat, though it’s also more humid. But the hottest season, usually from March to May, is when Thailand’s temperatures truly soar, and April often sees the most extreme temperatures.

Hottest month in 2024

According to the Thai Meteorological Department, April 2024 was the hottest month with average temperatures reaching 42.9°C (109.2°F) in many areas. This marks a significant rise compared to previous years, with temperatures forecasted to be approximately 2.6°C above normal nationwide. The extreme heat is attributed to a persistent heat low-pressure cell affecting upper Thailand throughout the month.

The temperature in each region

1. Central Thailand (Including Bangkok)

• Central Thailand is known for high humidity and extreme heat during the hot season. In 2024, average temperatures are projected to reach around 42.0-44.0°C (107.6-111.2°F) in this region, particularly in city areas like Bangkok, which may feel even hotter due to the urban heat island effect.

2. Northern Thailand (Chiang Mai, Chiang Rai)

• The north has more noticeable seasonal changes, with cooler winters and very hot summers.
• The peak heat generally comes in April, often surpassing 43°C (109°F). The highest recorded temperature in this region in April 2024 was 44.0°C in Lampang.

3. Northeastern Thailand (Isan Region)

• Known for extreme heat during the hot season, Isan can experience temperatures above 40°C (104°F), especially in provinces like Udon Thani and Nakhon Ratchasima. In April 2024, some areas recorded temperatures as high as 44.1°C.

4. Southern Thailand (Phuket, Krabi, Surat Thani)

• Southern Thailand is influenced by monsoon patterns, so temperatures are usually moderate.
• Though it’s warm year-round, the hottest period in the south is slightly earlier, around February to April, with averages of 33-35°C (91-95°F).

Temperature peaks by month (2024)

The following table provides an estimate of monthly temperature peaks by region for 2024, to give you a clearer picture of what to expect as the year unfolds:

Note: Temperatures are averages and can vary based on specific locations within each region. (based on data from the TMD)

Useful tips for expats living in Thailand

1. Beat the heat with local solutions

Thai people have plenty of tricks for staying cool. Try dressing in breathable, light-coloured fabrics like cotton or linen, and using cooling powders (popular in local shops) to combat heat rashes. Drinking fresh coconut water is another local favourite for staying hydrated.

If you’re interested more in clothes, we also have an article guide on the best clothes to wear for Thai heat.

2. Keep an eye on the UV index

The UV index in Thailand can get dangerously high, especially in April. According to the World Health Organisation, a UV index of 11 or higher is considered ‘extreme’ and can lead to sunburn in just 10-15 minutes. In Bangkok and other open areas, UV levels during the hottest months often exceed 11. Wear sunscreen, seek shade, and consider protective clothing.

3. Plan travel around the weather

Thailand is beautiful year-round, but certain destinations shine at different times. During the hot season, consider spending more time in beach destinations like Phuket or Koh Samui, where the sea breeze can be refreshing. In the cooler season, it’s ideal to explore northern Thailand’s mountains for hiking or cultural sightseeing without overheating.

4. Watch out for heat-related health risks

Living in a hot climate has health implications, especially for those who aren’t used to it. Heat exhaustion and dehydration are common, so stay hydrated and avoid outdoor activities during peak sun hours (10am to 3pm). If you start feeling dizzy, nauseous, or excessively sweaty, it’s best to rest in a cool place.

5. Adjust your AC for comfort and health

In Thailand, air conditioning is essential but can lead to temperature shocks, especially when going from a cold room to the hot outdoors. To avoid this, set your AC to around 25°C (77°F), which keeps your room cool without creating a stark contrast when you step outside.

Surprising facts you might not know

Thailand’s temperature rank

According to recent climate studies, Thailand ranks among the hottest countries in Southeast Asia, especially in city areas. Cities like Bangkok and Chiang Mai are particularly known for their heat due to factors like concrete infrastructure and limited green space.

Bangkok’s urban heat island effect

Bangkok consistently feels hotter than rural areas due to the ‘urban heat island’ effect. This phenomenon occurs when concrete, asphalt, and buildings trap heat, making cities warmer than surrounding areas. Studies show that Bangkok can be up to 4°C (about 7°F) hotter than nearby regions, especially in densely populated districts.

April’s temperature spike during Songkran

April is the hottest month, and coincidentally, it’s also the time for Songkran, the Thai New Year, known for its massive water fights. The water celebrations serve as a fun cultural tradition and a clever way to cool off during Thailand’s hottest days.

Cooling off in malls

In Bangkok, one of the most popular ways locals and expats alike beat the heat is by spending time in malls. Some of Thailand’s largest malls, like CentralWorld and Iconsiam, offer more than just shopping; they have recreational areas, food courts, and even indoor ice rinks to help you escape the heat.

Thailand’s weather can be intense, especially during the hottest months. Knowing what to expect month by month and region by region can help you plan better and make the most of your time here without letting the heat take a toll on your health or comfort.

Whether you’re looking to escape the city, spend time by the coast, or prepare your home for the hottest days, It’s better to know about Thailand’s unique climate to live comfortably and safely in the Kingdom.

FAQs about Thai weather