Climate Table
Thailand stretches over 1,600 km from north to south — the climate varies significantly. Here is an overview for the main travel destinations:
Bangkok (Central Thailand)
| Month | Temp. (°C) | Rain (mm) | Rainy Days | Rating |
|---|---|---|---|---|
| Jan | 26–33 | 10 | 1 | Very good |
| Feb | 27–34 | 20 | 2 | Very good |
| March | 28–35 | 30 | 3 | Hot |
| April | 29–36 | 65 | 6 | Very hot |
| May | 28–34 | 220 | 16 | Rainy season |
| June–Sept | 27–33 | 150–250 | 15–18 | Rainy season |
| Oct | 27–32 | 240 | 17 | Rainy season |
| Nov | 26–32 | 50 | 5 | Good |
| Dec | 25–32 | 10 | 1 | Very good |
Chiang Mai (Northern Thailand)
Cooler than Bangkok, especially November–February (nights 10–15°C!). The Burning Season (February–April) brings extreme air pollution — avoid! Best time: November–January.
Phuket / Krabi (Andaman Sea)
Rainy season May–October (heavy rainfall, high waves, some beaches dangerous). Best time: November–April (dry, calm sea).
Koh Samui / Koh Phangan (Gulf of Thailand)
Opposite monsoon! Best time: February–September. Main rainy season October–December (heavy, sometimes flooding). December and January are variable.
💡 Tipp
The golden rule: If you want to go to the Andaman Sea (Phuket, Krabi, Phi Phi) → travel November–April. If you want to go to the Gulf (Koh Samui, Phangan, Tao) → travel February–September. This way, you almost always have good weather, no matter when you fly.