Northernmost major city in Thailand, Chiang Rai was founded in 1262 by King Mengrai as the first capital of the Lanna Kingdom. It sits at the convergence of Thailand, Laos, and Myanmar — the famous Golden Triangle. The contemporary White Temple (Wat Rong Khun) has become one of Southeast Asia's most recognizable landmarks.
Nights sit around 23°C and afternoons around 31°C, though some days reach 34°C.
Chiang Rai barely changes season: afternoons sit around 32°C and nights around 20°C most of the year.
Some April days reach 39°C.
There is a clear wet season from May – October, peaking in August with around 373 mm. The dry months run from December – February.
Wind is rarely an issue; most months sit between calm and a light breeze. Air quality is worth watching: March averages an AQI of 120, while September clears to 48.
Days stretch to about 13.2 hours of light in June and shrink to 10.8 in December — something to weigh if you work to a fixed timezone.
For what you're after, the best months in Chiang Rai are February – April. Expect fast internet (250 Mbps) and a low cost of living (about €600 a month).
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