Answer
• Chiang Mai is located at an altitude of approximately 310 metres above sea level, which contributes to its milder climate compared to lower-lying areas in Thailand.
• The higher elevation results in cooler temperatures, especially during the night and early morning.
• Visitors may find that the temperature can drop significantly after sunset, so it's wise to bring a light jacket when exploring in the evenings.
• Additionally, the altitude can affect humidity levels, making the air feel fresher and less oppressive than in more humid coastal regions.
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.