Chiang Rai weather

Our guide to the weather in Chiang Rai during September

32

Average high

6

UV Index

294mm

Monthly rainfall

84%

Humidity

Chiang Rai offers a unique blend of traditional culture and modern attractions, making it an ideal destination for those seeking a varied and exciting holiday. September is a great time to visit as the weather is usually mild and sunny. We've looked at the most up-to-date weather data for Chiang Rai, covering the last 12 years up to 2024, plus we've asked our team of travel bloggers for their first-hand experiences in order to answer the most frequently asked questions about Chiang Rai weather in September.

How hot is it in Chiang Rai during September?

The temperature reaches around 32℃ during the daytime in September, falling away to 22℃ at night. Of course, the high humidity will make it feel even hotter. The UV index will be high at this time of year, so protection against skin and eye damage is needed. Try to limit exposure between 10am and 4pm. Apply broad spectrum SPF 30+ sunscreen every few hours, even if it's cloudy, or more frequently after sweating or swimming, and wear UV-blocking sunglasses too, and bear in mind that bright surfaces, such as sand and water increase UV exposure.

Does it rain in Chiang Rai during September?

On average, there will be 15 rainy days during the month, amounting to 293.6mm in total. That's a lot of rain. For comparison, the wettest months in the UK typically sees between 80mm and 100mm, depending on where you are. Due to the high temperature and humidity, you might expect lots of thunderstorms, however they're actually fairly infrequent at this time of year. On average, September will see just 6 days that produce a storm.

Is it windy in Chiang Rai during September?

No - there is very light air movement in September so conditions should be calm with light breezes at times.

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Chiang Rai Blog posts

From the UK's most popular travel bloggers

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Is Chiang Rai worth visiting? 10 Reasons why you should visit Chiang Rai

31st August 2023 by Italian Trip Abroad

Chiang Rai was a delightful destination for our short break. We thoroughly enjoyed exploring the city and taking part in various activities. Overall, we were very pleased with our experience. If you're wondering whether Chiang Rai is worth a visit, this guide will provide you with over 10 compelling reasons to go. From our initial impressions, we were already convinced that Chiang Rai is a must-see destination....

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Chiang Mai or Chiang Rai | Things You Must Know Visiting Northern Thailand

19th January 2023 by Italian Trip Abroad

During our backpacking trip in South East Asia, we had the chance to explore many places in Thailand. We spent almost a month in Chiang Mai and a week in Chiang Rai. We noticed a lot of differences between these two cities, so we thought it would be useful to clarify a few things....

Weather in Chiang Rai

Our month-by-month guide to the weather and climate in Chiang Rai

29.1

Chiang Rai weather in

January
33.5

Chiang Rai weather in

February
36.9

Chiang Rai weather in

March
37.9

Chiang Rai weather in

April
35.6

Chiang Rai weather in

May
31.8

Chiang Rai weather in

June
30.3

Chiang Rai weather in

July
30.4

Chiang Rai weather in

August
31.5

Chiang Rai weather in

September
31.3

Chiang Rai weather in

October
30.5

Chiang Rai weather in

November
28.5

Chiang Rai weather in

December