Chiang Mai Marathon

Chiang Mai, Thailand · December 20, 2026

64°·64° high·Calm·Dry

Weather

Race Day Weather

64°at start

81° high

Calm

Dry

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Warm start, adjust pace wisely

Runners will face temperatures starting at 64°F and peaking at 73°F, with high humidity at 84%. Wind will be light at 3 mph, not a factor in pacing. Given the conditions, it's advisable to start conservatively and stay hydrated throughout the race.

Race day forecast available in 50 days

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Distance: 26.2mi

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Race Info

The Chiang Mai Marathon starts at Tha Phae Gate in Chiang Mai's old city at 3:00 AM in December. The marathon and half marathon are point to point and finish at the King Naresuan the Great Monument in Mae Rim District, north of the city, with free shuttles back to the gate. The course is flat, and the race site gives race-morning temperatures of 12 to 18 C. The men's course record is 2:27:34, set by Lee Grantham of Great Britain in 2016.

Website

Race weekend

Sunday, December 20

3:00 AMMarathon (26.2 mi)

4:00 AMHalf Marathon (13.1 mi)

5:00 AM10K (6.2 mi)

3K Smile Run (1.9 mi)

Course Map

FAQ

When is the 2026 Chiang Mai Marathon?

The 2026 Chiang Mai Marathon will be held on Sunday December 20, 2026.

What is the time limit for the Chiang Mai Marathon?

The time limit for the Chiang Mai Marathon is 7 hours.

What will the weather be like for the 2026 Chiang Mai Marathon?

The forecast calls for a high of 84°F and a low of 61°F with a 0% chance of rain.

Historical Weather

Based on 5 years of data

Avg Temp

64°F

L:62° H:65°

RunScore

Conditions

Rain Freq

0 of 5 yrs

Wind1mph

Dew61°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

Year	Low / High	Rain	Dew Point
2024 Chiang Mai Marathon Partly cloudy throughout the day. 2024	63°/64°	-	61°
2023 Chiang Mai Marathon Partly cloudy throughout the day. 2023	66°/68°	-	64°
2019 Chiang Mai Marathon Clear conditions throughout the day. 2019	61°/64°	-	59°
2017 Chiang Mai Marathon Clear conditions throughout the day. 2017	57°/59°	-	55°
2016 Chiang Mai Marathon Partly cloudy throughout the day. 2016	65°/68°	-	64°

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