Chiang Rai in March

November through March offers perfect weather—cool mornings, warm afternoons, zero rain. December and January nights can drop to 10°C, so pack layers. This is peak season, meaning higher prices and crowds at major temples. But here's the thing: Chiang Rai never gets as crowded as other Thai destinations. Even in peak season, you can find quiet moments. April and May are brutally hot—40°C is normal—but you'll have temples almost to yourself. The rainy season from June to October brings daily afternoon showers, but mornings stay clear. Plus, the countryside turns impossibly green. Hotel rates drop by 40% during rainy season, and you'll see a different side of the Golden Triangle when rivers run high.