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Best time to visit Chiang Mai

Month-by-month weather, crowds, prices, and festival calendar — so you know exactly when to book.

Best time to visit Chiang Mai, Thailand

Month-by-month breakdown of weather, crowds, prices, and seasonal highlights.

Month	Weather	Crowds	Prices	Highlights
January	20-29°C, dry and sunny.	peak	peak	• Pleasant cool-dry weather • Clear skies for Doi Suthep views ⚠ Chinese New Year can cause a short surge in visitors.
February	22-32°C, dry and sunny.	high	high	• End of the cool season • Good for trekking and outdoor activities ⚠ The air quality can start to degrade towards the end of the month due to agricultural burning.
March	25-35°C, hot and increasingly dry.	moderate	moderate	• Hot but generally clear skies • Pre-monsoon warmth ⚠ This is the start of the burning season; air quality can be poor.
April	28-40°C, very hot and humid.	moderate	moderate	• Songkran (Thai New Year) water festival ⚠ Extremely hot, and air quality is often at its worst due to continued burning.
May	26-34°C, hot with increasing rainfall.	low	low	• Start of the green season, lush landscapes ⚠ Monsoon rains begin; can be heavy and disruptive. Air quality may improve slightly.
June	25-31°C, humid with frequent rain.	low	low	• Lush green scenery • Fewer tourists ⚠ Rainfall is common, though usually in short bursts.
July	25-31°C, humid with heavy rainfall.	moderate	moderate	• Emerald green landscapes • Waterfalls at their fullest ⚠ Peak of the rainy season; expect downpours.
August	25-30°C, humid with heavy rainfall.	moderate	moderate	• Vibrant green surroundings • Good deals on accommodation ⚠ Still very much the rainy season; some remote roads may be impassable.
September	24-30°C, humid with significant rainfall.	low	low	• Very lush scenery • Lowest prices of the year ⚠ Often the wettest month; flooding can occur.
October	23-30°C, less rain, more sunshine.	moderate	moderate	• Transition to the cool season • End of the heavy rains • Yi Peng Lantern Festival (usually mid-November, but preparations begin) ⚠ The start of the vegetarian festival (Jia Chai) often falls in October.
November	21-29°C, dry and sunny.	peak	peak	• Yi Peng Lantern Festival • Loi Krathong Festival • Ideal cool-dry weather ⚠ The most popular month; book accommodation and flights well in advance.
December	19-28°C, dry and sunny.	peak	peak	• Perfect cool-dry weather • Christmas and New Year festivities ⚠ Peak tourist season continues; expect high prices and crowds.

Annual events worth timing your trip around

April

Songkran Festival

The traditional Thai New Year, celebrated with massive water fights across the city.

October

Chiang Mai Vegetarian Festival (Jia Chai)

A nine-day festival where locals observe a strict vegetarian diet for spiritual purification.

November

Yi Peng Lantern Festival

Thousands of paper lanterns are released into the night sky, creating a magical spectacle.

November

Loi Krathong Festival

People float decorative baskets (krathongs) on rivers and canals to honor the water goddess.

February

Chiang Mai Flower Festival

A vibrant festival showcasing the region's diverse flora with parades and flower displays.

Insider timing tips

•The 'burning season' from late February to April significantly impacts air quality, making outdoor activities unpleasant and sometimes hazardous.
•While the rainy season (May-September) means fewer tourists and lower prices, the lush green landscape is beautiful, and rain often comes in predictable afternoon downpours.
•November is Chiang Mai's peak season due to the confluence of ideal weather and major festivals like Yi Peng and Loi Krathong, driving up costs.
•The shoulder months of October and early November offer a good balance, with rains subsiding and festivals approaching, before the highest prices hit.
•Be aware that during major local holidays like Songkran, many smaller businesses and some temples may have reduced hours or be closed.