2025-03-27
This weekend, the trend of very high temperatures continues across Thailand. At the same time, we are seeing improvements in air quality in Bangkok and Phuket, while Chiang Rai is once again experiencing levels that are classified as unhealthy for everyone.
Chiang Rai: High heat and continued bad air
- Friday: AQI 107 – Unhealthy air, highest temperature 37°C, lowest 19°C
- Saturday: AQI 101 – Unhealthy air, highest temperature 39°C, lowest 20°C
- Sunday: AQI 127 – Unhealthy air, highest temperature 40°C, lowest 21°C
Air quality in Chiang Rai remains at levels that are harmful to sensitive groups, and on Sunday the AQI is once again approaching the limit of being classified as harmful to everyone. Temperatures are extreme with 40°C on Sunday – the highest so far this year. Thai authorities have recently warned of a record-breaking summer with important advice to the public.
Bangkok: Improved air – but still hot weekend
- Friday: AQI 101 – Unhealthy air, highest temperature 36°C, lowest 26°C
- Saturday: AQI 95 – Moderate air, highest temperature 36°C, lowest 27°C
- Sunday: AQI 93 – Moderate air, highest temperature 34°C, lowest 28°C
Bangkok will have a slightly better weekend in terms of air quality, especially Saturday and Sunday where the values will be in the moderate range. However, the heat will persist with temperatures of 36°C on both Friday and Saturday.
Phuket: Stable air quality and slightly cooler weather
- Friday: AQI 73 – Moderate air, highest temperature 29°C, lowest 26°C
- Saturday: AQI 72 – Moderate air, highest temperature 29°C, lowest 27°C
- Sunday: AQI 61 – Good air, highest temperature 29°C, lowest 26°C
Phuket will continue to have a stable weekend with cooler temperatures and improved air quality. Sunday will be particularly favorable with an AQI of 61 – a level that is classified as good air according to international guidelines.
Summary and recommendations
- Chiang Rai: Avoid outdoor activities during the day. Sunday has both the highest temperature and the worst air.
- Bangkok: Air quality improves over the weekend, but it's still hot – drink plenty of water and limit physical activity.
- Phuket: Best air quality this weekend, and temperatures are slightly lower – a good destination for those who want cleaner air.
What does AQI mean?
The AQI (Air Quality Index) shows how healthy or unhealthy the air is. The higher the value, the worse the air quality. Values above 100 affect sensitive groups, while levels above 150 can be harmful to everyone.
| AQI | Category | Health advice |
|---|---|---|
| 0–33 | very good | Enjoy outdoor activities |
| 34–66 | Bra | Enjoy outdoor activities |
| 67–99 | Moderate | Sensitive people should plan strenuous activities when air quality is better |
| 100–149 | Bad | Sensitive groups: Reduce or reschedule strenuous outdoor activities |
| 150–200 | Very bad | Sensitive groups: Avoid strenuous activities Everyone: Limit strenuous outdoor activities |
| 200+ | Dangerous | Avoid all physical activity outdoors. |
Related: Thai authorities warn of extreme heat in April 2025 – see recommendations on how to protect yourself in the heat.
Source: Air quality data is taken from IQ Air
Text: The editorial staff
Image license: kordi_vahle, Pixabay, original image
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