Chiang Mai Travel Tips
Best Time, Budget, SIM, Packing

🔄 Updated 21 Jun 2026

First, the quick lay of the land. Chiang Mai is in northern Thailand and the weather splits clearly into three seasons: the cool season (Nov–Feb), the hot/burning season (Mar–May), and the rainy season (Jun–Oct). Each one gives you a completely different trip, so picking the month is the single biggest decision you'll make. Let's go through it piece by piece.

The most important thing — which month to go

If you could only get one thing right before everything else, get the month right. The month you go shapes the views, the weather, hotel prices, and how comfortable the whole trip feels. Here's an honest rundown of each stretch of the year.

• November–February (cool season · the best) — cool, pleasant air, clear skies, sharp mountain views. Great for everyone, especially first-timers. This is true high season, so rooms fill up and prices climb — book several weeks ahead.
• Late October–early November (end of rains, start of cool · best value) — a lot of people say this is the prettiest stretch of the year. The forest is still green from the rains, the air is starting to cool, there's no haze yet, and the crowds haven't arrived.
• June–October (rainy / green season · underrated) — green forest, full waterfalls, lovely seas of mist. Rain tends to come in bursts rather than all day. Fewer people and clearly cheaper rooms.
• Late February–April (burning season · best avoided) — PM2.5 readings climb very high and the mountain views turn hazy. The exception is if you're specifically coming for the Songkran water festival around the moat on April 13–15.

The March-April burning season — why avoid it (and what to do if you must go)

Better to say this straight. From late February through April, fields and forests across the north — and in neighbouring countries — are burned, and the smoke settles in the valley basin where Chiang Mai sits. PM2.5 readings stay high for weeks at a stretch. On the worst days, Chiang Mai has ranked as the city with the worst air quality in the world, with readings several times over the safe limit.

• The views vanish — head up Doi Suthep or Doi Inthanon and you'll see nothing. The sky is a pale, hazy white all day and photos don't come out.
• Your health — stinging eyes and throat. If you're sensitive to dust, have allergies or a respiratory condition, or you're travelling with young kids or older relatives, seriously consider skipping it.
• Outdoor plans stall — trails, waterfalls, cycling, countryside cafés all become a half-baked experience.

Roughly how much per day

A Chiang Mai budget flexes a lot, because food is cheap and there's accommodation at every level. The numbers below are per person, per day, not including round-trip flights, but they do cover lodging (split between two for a couple), food, getting around town, and a reasonable amount of entry fees. Use them as a rough frame and adjust to your own style.

What to wear — by the season you're visiting

Chiang Mai isn't cold year-round the way a lot of people assume. What you wear depends on the month and whether you're heading up the mountains. The thing people most often get wrong: it's warm in town but much colder up on the mountains, especially before dawn and at night.

• Cool season (Nov–Feb) — daytime in town is around 25–30°C, so light clothes are fine, but nights and early mornings drop to around 13–18°C, and on the high mountains it can hit single digits. Pack a warm jacket or hoodie. If you're set on seeing the sea of mist or sunrise up on a peak, bring something genuinely warm.
• Hot / burning season (Mar–May) — hot and dry, daytime touching 35–40°C. Wear breathable, light, pale-coloured clothing, and pack a hat, sunglasses and sunscreen. If the haze is heavy, add an N95 mask.
• Rainy season (Jun–Oct) — warm and humid with rain in bursts. Carry a folding umbrella or a light rain jacket and shoes that dry fast once wet. Skip leather or canvas shoes that soak up water.
• Temple visits, any season — Chiang Mai temples are strict about dress. Bring something to cover your shoulders and a cloth or trousers to cover your knees. Tank tops and shorts usually won't get you into the prayer hall.

SIM / internet — what to pick

Signal is good across town in Chiang Mai, so Thais who already have a SIM barely need to do anything. But if you're heading up the mountains, into the forest, or to a national park, coverage varies a lot. Here are the main options.

• Already have a Thai SIM — you're set, just check you have enough data left. All carriers have good signal in town. If you'll be heading up the mountains or into national parks often, AIS tends to have the best coverage in hilly and forested areas.
• Foreign visitors — tourist SIM — AIS Traveller and dtac Happy Tourist are sold at counters in Chiang Mai Airport, in both domestic and international departures. Prices start in the low hundreds depending on the number of days and data, and you get a Thai number with it.
• eSIM — the most convenient option for newer phones that support it. Install it from home before you fly, with no airport queue. There are options from Thai carriers (dtac/AIS) and international providers like Airalo, starting at a few hundred baht for several gigs of data.
• 7-Eleven — you can buy a prepaid SIM all over town in a pinch, though the package options are fewer than at the carrier counters in the airport.

What to pack — a checklist

You can buy almost everything in Chiang Mai, so there's no need to haul it all. But a few things will frustrate you if you forget them. Here's what people tend to forget or should keep in their bag.

Small things that make the trip run smoother

• Download Grab/Bolt before you go — you see the price before you tap, so there's no haggling over a red-truck fare. Airport into town runs around 100–150 THB.
• Book lodging ahead if you go in the cool season — over Nov–Feb and Songkran the good places fill up fast.
• Pick a neighbourhood that fits your style — the Old City is handy for walking between temples, Nimman is for cafés and nightlife, and Riverside (Ping) is quiet and calm.
• Allow travel time for the mountains — Doi Suthep is around 40 min from town, while Doi Inthanon is nearly a full day round trip. Don't pack the day too tightly.
• Long weekends and Songkran get very crowded — fun but packed. If you don't like the crush, weekdays are more comfortable.