Thailand has drafted a 2027 plan to cut PM2.5 dust, and the Ministry of Natural Resources and Environment agreed it in principle on 5 November. It aims to lower average PM2.5 levels by 5–10% against 2026, but it is still a draft for the National Environment Board and the Cabinet. Explera DMC Thailand explains what it means for northern trips from February to April 2027.
Explera handles ground arrangements as a Thailand DMC for travel agents. Its Thai company, Explera DMC Co., Ltd., holds TAT licence 14/05119, the Tourism Business Licence issued by the Department of Tourism, and the group is IATA TIDS-registered (96215733) and a member of ASTA (900408341). Write to b2b@explera.co.th.
What does the 2027 PM2.5 draft say?
Nation Thailand reported the draft in early November. Besides the 5–10% cut in average PM2.5, it aims for 5–15% fewer days above the national standard, at least 10% less forest area burned and 10–15% less farmland burned, all measured against 2026. The plan says it wants to act before the pollution season starts rather than after the readings rise. Fire prevention would focus on 14 high-risk forest complexes, with drones and thermal cameras. There are also checks on smoky vehicles, bus depots, construction sites and factories, more low-emission zones, a section on haze from neighbouring countries, and dust-free rooms and masks for the public.
Two things are not yet known: whether the National Environment Board and the Cabinet approve it as drafted, and how much budget it gets. Treat the numbers as targets, not forecasts.
Why does it matter for northern Thailand trips?
The burning season in the North usually runs from about February to April. Spring 2026 was a hard one. On 14 April the Minister of Natural Resources and Environment ordered high-risk forests across the country closed to outsiders, and Nan's governor had already closed nine national forest reserves until 30 April. Air-quality monitor IQAir ranked Chiang Mai the most polluted major city in the world on several days in early April.
A target of 5–10% is a modest improvement on a bad year. It does not promise clear skies, and nobody can tell you in November what a given week in March 2027 will be like. Our post on Chiang Mai in April: heat and air quality explains how to talk to clients about it without overclaiming.
How should agents plan northern trips for 2027?
Sell the cool season first. December and January are the best months for Chiang Mai, Chiang Rai, Nan and Mae Hong Son, and that is when trekking, hill-tribe villages and mountain viewpoints are at their best. For February to April, keep doing what worked this year:
- Put the burning season in the proposal in plain words, so it is not a surprise.
- Build itineraries that can switch from forest and mountain days to city, temple, cooking and craft days if the air is poor or a forest area is closed.
- Choose hotels with good indoor space and filtered air for clients with asthma, heart conditions or young children.
- Agree change and cancellation terms with clients before they book, and check that their insurance covers it.
A Thailand DMC on the ground can watch the daily readings and any closure orders and change the programme before the group arrives. Our tours and activities team keeps indoor alternatives ready for the North, and the rest of what we do is on our Thailand DMC services page.
Next steps
Send us your northern Thailand dates, group size and must-see places through our contact page. As your Thailand DMC, the trade desk replies within 24 hours and will tell you which months and which routes we suggest.
Sources
- Nation Thailand: Thailand drafts 2027 PM2.5 policy targeting 5–10% reduction
- Nation Thailand: Govt orders nationwide forest lockdown to fight wildfires and PM2.5
- Nation Thailand: Nan governor orders closure of nine national forests to combat toxic smog
Frequently asked questions
Is the 2027 PM2.5 plan in force?
No. It is a draft that the Ministry of Natural Resources and Environment agreed in principle on 5 November 2026. It still goes to the National Environment Board and the Cabinet.
When is the burning season in northern Thailand?
It usually runs from about February to April and varies a lot from year to year and week to week. Air quality tends to improve once the first rains arrive.
Can forests and trekking areas close during the haze?
Yes. In April 2026 the government closed high-risk forests to outsiders, and Nan closed nine national forest reserves until 30 April. Plan an indoor or city alternative for every forest day in February to April.
What is the best time to sell Chiang Mai and the North?
The cool season from November to January, when the air is usually clear and mornings in the mountains are cold. February to April can still work with flexible plans and honest advice to clients.
