Weather in Chiang Rai in September
Chiang Rai, Thailand averages a high of 29°C (84.2°F) and low of 22.7°C (72.9°F) in September, with 23 rain days and 8.4 hours of daily sunshine. Travel score: 63.8/100 (Good). The best time to visit Chiang Rai is February.
High
29°C84°F
Low
23°C73°F
🌧️
23
rain days
☀️
8.4
hrs/day sunshine
💧
87%
humidity
64— Good
September in Chiang Rai is hot and very rainy — pack an umbrella and enjoy indoor attractions too.
What are the average temperatures in Chiang Rai?
How much does it rain in Chiang Rai in September?
Chiang Rai receives an average of 288.8mm of rainfall across 23 rainy days in September. The annual total is 1990.5mm.
What should I pack for Chiang Rai in September?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
👕
Light layers and t-shirts
Warm weather around 29°C
🧥
Waterproof jacket
Frequent rain expected (23 rainy days)
☔
Umbrella
Essential for the rainy season
👢
Waterproof shoes
Keep your feet dry in wet conditions
🧴
Sunscreen SPF 30+
8 hours of sunshine daily
🕶️
Sunglasses
Protect your eyes from bright sun
Traveling to Thailand in September?
Don't let a public holiday surprise you — restaurants, shops, and attractions may be closed.
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Data based on 1994–2024 averages · Last updated: 2024-12-31