CNXlocal — Your Guide to Chiang Mai
Yi Peng sky lanterns rising over Chiang Mai at night
Trip planning

When to Visit Chiang Mai

A month-by-month look at weather, air quality, crowds, prices and festivals — so you can pick the right time to go.

These are rough seasonal patterns, not a forecast. Weather, smoke, prices and festival dates vary each year. Before booking, check the Chiang Mai forecast, current air quality on Air4Thai and the event organizer’s dates.

JanFebMarAprMayJunJulAugSepOctNovDec
Cool & dry
Burning
Rainy & green
Cool & dry
Best weather
Hazy air
Cheap & lush
Best weather

Month by month

January

Cool & Dry
31° / 14° Clear skies Peak tourist season High season rates Almost none
Bo Sang Umbrella Festival — Mid-Jan

The best month for outdoor activities. Book accommodation early.

February

Cool & Dry
33° / 16° Haze building Still peak season High season rates Almost none
Chiang Mai Flower Festival — February; dates vary by year

Flower festival is worth catching. Haze can arrive early, so check current air quality.

March

Burning Season
36° / 20° Hazardous smoke Tourists leave Shoulder rates Minimal

Often a difficult month for air quality. Keep outdoor plans flexible and check daily readings.

April

Burning Season / Songkran
36° / 23° Smoke can persist Songkran brings visitors Mixed rates First showers
Songkran — Apr 13-15

Songkran brings heat and crowds. Rain may help the haze, but there is no guaranteed clear-air date.

May

Early Rainy
34° / 23° Rain clears the air Low season starts Low season deals Afternoon showers
Visakha Bucha — Full moon of May

Great value month. Rain is usually just afternoon thunderstorms, mornings are clear.

June

Rainy
33° / 23° Fresh air Very quiet Best deals Regular rain

Lush green everywhere. The city feels like it belongs to locals again.

July

Rainy
32° / 23° Fresh air Very quiet Best deals Wettest stretch
Asalha Bucha / Khao Phansa — Full moon of Jul

Pack a rain jacket. Waterfalls are at their best this month.

August

Rainy
32° / 23° Fresh air Quiet Low season Heavy rain

Rice paddies are emerald green. Stunning drives through the countryside.

September

Late Rainy
31° / 22° Fresh air Quietest month Lowest prices Still heavy

Cheapest month to be here. Occasional flooding in low-lying areas.

October

End of Rainy
31° / 21° Clear Starting to pick up Shoulder season Tapering off
Ok Phansa — Full moon of Oct

Sweet spot month. Rain is ending, crowds haven't arrived, prices are still low.

November

Cool & Dry
30° / 18° Clear skies Festival crowds Rising Occasional
Yi Peng / Loi Krathong — Full moon of Nov

The lantern festival is unforgettable. Book months in advance for Yi Peng tickets.

December

Cool & Dry
29° / 14° Clear skies Holiday season Peak prices Dry
King Bhumibol Day — Dec 5
New Year's Eve — Dec 31

Perfect weather but peak prices. The mountains get cold at night — bring a jacket.

From the locals

We live here, too

CNXlocal is a real Chiang Mai family building free tools and guides to make your trip easier. The grid above is the quick scan — for the full story on each season, what to pack and when to book, read on:

Chiang Mai Burning Season: Dates, Air Quality & What You Need to Know
NomadsExpat FamiliesVisitorsHealthEvents

Chiang Mai Burning Season: Dates, Air Quality & What You Need to Know

Is Chiang Mai's air quality bad right now? During burning season, often around mid-February through April, it can be unhealthy. Conditions can change quickly, so check the official Air4Thai reading for the day you are making plans. If Chiang Mai is on your list, you've probably already heard about the burning season. It's the one…

Updated September 8, 20268 minute readKristifer SzaboRead More