When is Songkran in Chiang Rai?

13 to 15 April every year, citywide and free. Songkran in Chiang Rai is far less commercial than in Bangkok or Chiang Mai, and you will be soaked for three days.

Does it rain all day in the Chiang Rai green season?

No. From May to October rain usually arrives as one heavy hour in the afternoon and then clears. Mornings are reliably dry, which is why tours in that season start early.

Chiang Rai Events & Festivals 2026: Month-by-Month Calendar

Q: When is Loy Krathong in Chiang Rai in 2026?

Loy Krathong 2026 falls on 5 November. In Chiang Rai krathongs are floated on the Kok River and at temple ponds across the city. Joining in is free and a krathong costs 30 to 50 THB from a stall by the water.

Q: When is the Chiang Rai Flower Festival?

The Chiang Rai Flower Festival runs from late December to mid February at Hat Nakhon Chiang Rai Public Park. The 2025 to 2026 edition ran from 26 December to 18 February. Entry is free with a small fee for some display zones.

Q: What is the best month to visit Chiang Rai?

November to mid February. Skies are clear, days reach 25 to 28 degrees, nights are cool, and both Loy Krathong and the Flower Festival fall in that window. December and January are peak season so book accommodation ahead.

Q: What is the worst month to visit Chiang Rai?

March. Agricultural burning across northern Thailand, Myanmar and Laos fills the valley with smoke. The air quality index in Chiang Rai passed 300 in March 2026 and the mountain viewpoints are invisible.

The short answer — when to come

Chiang Rai has three seasons that matter to a visitor, and they are not the ones on the weather widget.

November to mid-February — the good months. Dry, 15–28°C, clear mountain views. Loy Krathong falls on 5 November 2026, and the Flower Festival runs from late December. This is when the province looks the way the photos promise.
Mid-February to April — burning season. Agricultural burning fills the valley with smoke. In March 2026 Chiang Rai's air quality index hit 313 and PM2.5 sat at four times the World Health Organization daily limit. Songkran (13–15 April) is still worth coming for, but the mountain views are gone.
May to October — green season. Rain comes in short afternoon bursts, not all-day drizzle. Waterfalls run, the tea terraces are the greenest they get, hotels are cheapest, and you will have the White Temple almost to yourself.

Local truth: almost every guide tells you to avoid the rainy season and says nothing about the smoke. It is the wrong way round. A wet afternoon in August costs you an hour. A bad week in March costs you the view from every mountain in the province.

Every week

Saturday Night Walking Street (every week)

📅 Every Saturday, ~16:00–22:00 · 📍 Thanalai Road, city center · 🎟 Free

Weekly street market with northern Thai food, crafts, and evening folk dancing.

Best for: Local food and atmosphere

Sunday Walking Street (Happy Street)

📅 Every Sunday evening · 📍 Sankhongnoi Road · 🎟 Free

Smaller, even more local Sunday version of the walking street.

Best for: A second chance if you missed Saturday

Festivals & seasonal

Loy Krathong Festival

📅 5 November 2026 · 📍 Kok River and temple ponds around Chiang Rai · 🎟 Free (krathong 30–50 THB)

Floating krathong baskets on the Kok River, lanterns, music, and local fairs.

Best for: Everyone — one of Thailand's most beautiful nights

Chiang Rai Flower Festival (ASEAN Flowers)

Chiang Rai Flower Festival — dates, venue and what to expect

📅 Late December – mid February · 📍 Hat Nakhon Chiang Rai Public Park, riverside · 🎟 Free / small fee for some zones

Huge flower displays during Chiang Rai's best weather of the year.

Best for: Families, photographers, cool-season visitors

Songkran (Thai New Year)

📅 Apr 13–15 · 📍 Citywide · 🎟 Free

Thailand's New Year water festival — the whole town turns into a giant, joyful water fight for three days.

Best for: Everyone, families, first-timers

Cherry Blossoms Bloom

📅 Late December–January · 📍 Doi Mae Salong & mountain roads · 🎟 Free

Pink Nang Phaya Sua Krong cherry blossoms bloom across the northern hillsides around Doi Mae Salong — a brief, beautiful cool-season sight.

Best for: Photographers, cool-season visitors

Loy Krathong follows the lunar calendar, so it moves every year — 2026 falls on 5 November. Flower Festival dates are set by Chiang Rai City Municipality each December; the 2025–26 edition ran 26 December to 18 February. We check both before every cool season.

Month by month

What is actually on, what the weather does, and whether it is a good month to be here.

Month	What is on	Weather	Worth coming?
January	Flower Festival at Hat Nakhon park; cherry blossoms at Doi Mae Salong	Cool and dry, 14–28°C, chilly mornings in the hills	Best month of the year
February	Flower Festival runs to mid-month; Chinese New Year at Mae Salong	Warming up; haze starts building late in the month	Very good in the first half
March	Nothing worth planning around	Hot and smoky — the worst air of the year	Avoid if you came for mountains
April	Songkran, 13–15 April — the whole town becomes a water fight	Hottest month, 35°C+; smoke usually clears after the first rain	Come for Songkran, not for the views
May	Quiet; first rains	Storms clear the air; landscape turns green fast	Underrated and cheap
June–August	Quiet; local temple fairs	Short afternoon downpours, 24–32°C	Greenest tea plantations, fewest tourists
September–October	End of rains; rice terraces at their fullest	Wettest weeks, but mornings usually clear	Good value, pack a rain jacket
November	Loy Krathong, 5 November 2026 — floating lanterns on the Kok River	Cool season begins; clear skies return	The best week of the year
December	Flower Festival opens late in the month; cherry blossoms begin	Coolest month, 13–27°C	Excellent — book ahead

Whichever month you land in, the long northern loop is the day that needs planning — see the Chiang Rai itineraries and what each stop costs to enter.

The burning season nobody puts on an events page

Between roughly mid-February and mid-April, farmers across northern Thailand, Myanmar and Laos burn crop stubble, and the smoke settles into the valleys. Chiang Rai is in one of those valleys.

It is not a rumour and it is not mild. On 27 March 2026 the air quality index in Nang Lae reached 313, in the "very unhealthy" band, and PM2.5 readings across the city ran 68–81 µg/m³ against a World Health Organization daily guideline of 15. Chiang Rai province had logged 967 fire hotspots by the end of March.

What that means in practice, if March is the only time you can travel:

Phu Chi Fa, Doi Tung and Mae Salong lose their point. You will drive two hours to a viewpoint and see white.
The temples are fine. The White Temple, Black House and Blue Temple are close-range sights and photograph normally.
Bring N95 masks if you have asthma or are travelling with small children, and check the daily index before committing to a mountain day.
Prices are at their lowest. If you are here for food, temples and markets rather than scenery, March is genuinely good value.

Straight answer: if you can move your trip, move it to November or December. If you cannot, plan a temple-and-food trip rather than a mountain trip, and you will still have a good week.

Chiang Rai events FAQ

When is Loy Krathong in Chiang Rai in 2026?

5 November 2026. Krathongs are floated on the Kok River and at temple ponds across the city, and the evening is free to join — you buy a krathong for 30–50 THB from a stall by the water.

When is the Chiang Rai Flower Festival?

It runs from late December to mid-February at Hat Nakhon Chiang Rai Public Park by the river. The 2025–26 edition ran 26 December to 18 February. Entry is free, with a small fee for some display zones.

What is the best month to visit Chiang Rai?

November to mid-February. Skies are clear, days are 25–28°C, nights are genuinely cool, and both Loy Krathong and the Flower Festival fall inside that window. December and January are the peak, so book accommodation ahead.

What is the worst month to visit Chiang Rai?

March. Agricultural burning across the region fills the valley with smoke — the air quality index passed 300 in March 2026 — and the mountain viewpoints that make the province worth the trip are invisible.

Is Songkran worth staying for in Chiang Rai?

Yes, if you do not mind being soaked for three days. 13–15 April, citywide, free, and far less commercial than Bangkok or Chiang Mai. Put your phone in a waterproof pouch and do not plan anything else.

Does it rain all day in the green season?

No. May to October rain usually arrives as a heavy hour in the afternoon, then clears. Mornings are the reliable part of the day, which is why tours in that season start early.

Chiang Rai Events & Festivals