When to go · Chiang Rai

Chiang Rai in September

Avoid month. Listed as a month to avoid: Mar–Apr (smoke and heat), Sep (wettest).

Key facts

Verdict: Avoid
Temperature: 31°C (88°F)88°F (31°C) / 23°C (73°F)73°F (23°C); average high / low
Rain days: 17
Crowds: Low; Thailand overall
Prices: Low; Thailand overall

Plan around it

Verdict

AvoidBest and avoid months for Chiang Rai

Listed as a month to avoid: Mar–Apr (smoke and heat), Sep (wettest).

September is rated avoid. These months rate higher:

Long-term averages

Chiang RaiHighs around 31 °C (88 °F), lows around 23 °C (73 °F), rain on about 17 daysHighs around 88 °F (31 °C), lows around 73 °F (23 °C), rain on about 17 days
North, Thailand · Chiang Mai, Chiang Rai, Pairainy
Cool nights Dec–Jan; the burning season (Feb–Apr) puts air quality among the worst in Asia — check AQI before booking.

Thailand overall: Wettest month in Bangkok and on the Andaman coast; flooding in low areas. Only for low prices.

Weather, crowds and prices for any two months in Chiang Rai, side by side.

First month

Second month

September: Listed as a month to avoid: Mar–Apr (smoke and heat), Sep (wettest).

January: Inside Chiang Rai's best window: Nov–Jan.

Chiang Rai: figures are long-term averages from this guide, not a forecast.