Answer
During the dry season, especially from February to April, air quality can be a concern due to agricultural burning.
• Monitoring local air quality reports can help you choose the best days for outdoor activities.
• It's advisable to have a mask handy if you're sensitive to pollution or plan to be outside for extended periods.
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.
Updated 2025-09-17





