Thailand's Climate:
What to Expect Year-Round
Thailand has three distinct seasons and the climate varies significantly between regions. The north has cool winters. The south has rain when the north is dry. Understanding the seasons before you arrive helps you pack correctly, time your travel and choose the right city for your lifestyle.
Thailand's Three Seasons Explained
Climate by City and Region
Thailand's climate varies significantly between regions. The north and south follow opposite wet seasons.
Bangkok has three clear seasons, and each one feels very different. From March to mid-May it is at its hottest, and the humidity makes afternoons feel much hotter than the temperature suggests. From mid-May to October the rain arrives, but it falls in short heavy bursts in the afternoon or evening rather than all day, and mornings are nearly always sunny. September and October are the wettest months, when streets in low-lying areas can flood for a few hours after a downpour, so it is worth checking this before you pick a neighbourhood. From November to February the weather is at its best, with one downside: December to February is also when the city's air is at its most polluted.
Best months
November to February
Most challenging
April to June
Air quality
Moderate: worst December to February
Monthly rainfall (mm) and average temperature (°C)
How to Live Comfortably in the Heat
Six things that make the difference between struggling with the heat and thriving in it.
Air conditioning is not a luxury in Thailand. It is how people function. Your apartment, office, coworking space, restaurants and malls will all be air-conditioned. The transition from outside heat to indoor cold takes getting used to. Carry a light layer for restaurants and coworking spaces which often run very cold.
Outdoor activity in the hot season is best planned for early morning (before 9am) or evening (after 5pm). The hours between 11am and 3pm are genuinely unpleasant outside. Thais have structured their daily rhythms accordingly for centuries. Fighting this is unnecessary: work with it.
You will sweat more than you expect, particularly in the first weeks. Drink water consistently throughout the day, not just when you feel thirsty. Coconut water is excellent for hydration and available everywhere for around 30 to 40 THB. Avoid excessive alcohol during the hottest months.
Lightweight, loose, light-coloured natural fabrics (cotton, linen) breathe and dry quickly. Synthetic performance fabrics also work well. Avoid dark colours and anything tight-fitting during the hot season. Sunscreen on exposed skin is non-negotiable.
If you live in or near Chiang Mai, plan to leave during February to April when agricultural burning creates severe air pollution. Air quality can reach hazardous levels on bad days. Many long-term Chiang Mai residents spend these months elsewhere: Bangkok, Phuket or abroad.
The rain comes in bursts, not all day. A typical rainy season afternoon: hot sunny morning, clouds build around 2pm, heavy downpour from 3 to 5pm, clears before evening. Plan outdoor activities for morning, work through the afternoon rain, enjoy the cooler evening. Accommodation prices drop 20 to 40 percent during rainy season.
The Right City for Your Climate Preference
Hate the heat? Chiang Mai has cool winters. Love the beach year-round? Phuket or Hua Hin. Want the most comfortable urban climate? Bangkok in the cool season. Tell us your priorities and we will help you find the right city and the right apartment.