Weather at Bangkok Suvarnabhumi International Airport
The weather in Bangkok is warm and tropical throughout the year. The 'cool' dry season is from November to February, and this is also the tourist high season. Starting in February, the days, and nights, will become increasingly warmer until around April, when daytime highs can easily reach 40°C / 100°F. Rains will start to fall in April and May, with the rainy season reaching its height in August and September. Note that rains typically come in heavy late afternoon thunderstorms. Mornings can be clear and sunny.
Five-Day Weather Forecast for Bangkok
Weather information provided by Weather Underground.