Chiang Mai Marathon

Chiang Mai, Thailand · December 20, 2026

64°·73° high·Calm·Dry

Weather

Race Day Weather

64°at start

81° high

Calm

Dry

Warm start, mild finish

Runners will face temperatures starting at 64°F and cooling slightly to 63°F by race end. With humidity at 84%, it's crucial to start conservatively and stay hydrated. Wind will be light from the NNE, having minimal impact on pace. Overall, conditions are favorable for a strong race.

Race day forecast available in 31 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

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 9 years of data

Avg Temp

73°F

L:64° H:74°

RunScore

Conditions

Rain Freq

0 of 9 yrs

Wind4mph

Dew62°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

Year	Low / High	Rain	Dew Point
2025 Chiang Mai Marathon Partly cloudy throughout the day. 2025	63°/73°	-	61°
2024 Chiang Mai Marathon Partly cloudy throughout the day. 2024	63°/73°	-	61°
2023 Chiang Mai Marathon Partly cloudy throughout the day. 2023	66°/77°	-	65°
2022 Chiang Mai Marathon Partly cloudy throughout the day. 2022	72°/75°	-	58°
2021 Chiang Mai Marathon Partly cloudy throughout the day. 2021	66°/72°	-	64°
2019 Chiang Mai Marathon Clear conditions throughout the day. 2019	61°/75°	-	60°
2018 Chiang Mai Marathon Partly cloudy throughout the day. 2018	63°/75°	-	63°
2017 Chiang Mai Marathon Clear conditions throughout the day. 2017	57°/70°	-	56°
2016 Chiang Mai Marathon Partly cloudy throughout the day. 2016	65°/73°	-	64°

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