Answer
• Chiang Mai experiences a tropical climate with three distinct seasons: hot, rainy, and cool.
• The cool season from November to February is the most pleasant, with temperatures ranging from 15 to 28 degrees Celsius.
• The hot season from March to June can be quite warm, reaching up to 40 degrees Celsius.
• The rainy season from July to October brings heavy rainfall, particularly in August and September, so it's advisable to pack an umbrella or raincoat during this time.
• Always check the weather forecast before your trip to plan accordingly.
Practical Chiang Mai planning note: For weather and air quality, check a current forecast and a live air-quality source shortly before the activity. Northern Thailand can experience strong seasonal variation, and conditions differ between the city, foothills and higher mountains.