Quick answer: Thailand’s best weather is the cool, dry season (November–February). March–May is very hot; June–October is the rainy (green) season.
Planning a trip to Thailand? Here’s the weather month by month, plus the best time to visit.
Thailand weather by month
| Month | Avg temp | What to expect |
|---|---|---|
| Jan | 22–32°C | Cool, dry, sunny — peak season. |
| Feb | 23–33°C | Dry and warm; excellent. |
| Mar | 26–34°C | Hot and dry. |
| Apr | 27–35°C | Hottest month (Songkran). |
| May | 27–34°C | Hot; rains begin. |
| Jun | 26–33°C | Green season; showers. |
| Jul | 26–32°C | Rainy but warm. |
| Aug | 26–32°C | Wettest in places. |
| Sep | 25–32°C | Wettest month overall. |
| Oct | 25–32°C | Rains easing. |
| Nov | 24–32°C | Cool-dry begins — great. |
| Dec | 22–32°C | Cool, dry, peak season. |
The best time to visit Thailand
November to February is ideal nationwide; for the islands, the Gulf coast (Koh Samui) stays drier later into the year.
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Written by
John Morrison is the founder and lead travel writer at Packzup. Over the past decade he has explored destinations across Africa, the Americas, Asia, Europe, the Middle East, and Oceania — always self-funded, never on a press trip.