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Packing for Chiang Mai can vary quite a bit depending on the season. In the cooler months from November to February, lightweight long sleeves and a light jacket are great for the cooler evenings. Don't forget comfortable shoes for exploring!
• During the hot season from March to May, breathable fabrics and sunscreen are essential. If you're visiting during the rainy season from June to October, a waterproof jacket and an umbrella will be your best friends. Always pack a refillable water bottle to stay hydrated!
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.