Chiang Mai Half Marathon

Chiang Mai, Thailand · December 20, 2026·
partly-cloudy-night64°·64° high·Calm·Dry
6
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Race Day Weather

partly-cloudy-night
64°at start
71° high
Calm
Dry
Your goal
0:00:00

Comfortable temps

Starting at 64°F, heat will be a factor from the gun — go out conservative and stay on top of hydration. High humidity (88%) will make it harder to cool down through sweat — increase fluid intake accordingly.

Race day forecast available in 49 days
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Pace Calculator

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Race Info

The Chiang Mai Half Marathon runs 21.1 kilometers from Tha Phae Gate in the old city to the King Naresuan the Great Monument in Mae Rim District, north of Chiang Mai. The route passes Wat Rajamontean, Wat Lok Moli and Chang Phuak Gate, loops around the moat past Chiang Mai Gate and Suan Dok Gate, then heads out along Huay Kaew Road and the Nimman area. It continues past the convention center and the 700th Anniversary Stadium before following the bike lane to the finish. The course is flat, and it is a point-to-point route with free shuttles back to the gate.

Race weekend

Sunday, December 20
3:00 AMMarathon (26.2 mi)
4:00 AMHalf Marathon (13.1 mi)
5:00 AM10K (6.2 mi)
5:20 AM3K Smile Run (1.9 mi)
Area Map

Course Map

FAQ

When is the 2026 Chiang Mai Half Marathon?

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

What is the time limit for the Chiang Mai Half Marathon?

The time limit for the Chiang Mai Half Marathon is 3.5 hours.

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

The forecast calls for a high of 84°F and a low of 61°F with a 0% chance of rain. Check our detailed hourly forecast above for the best half marathon race plan.

Historical Weather

Based on 5 years of data
Avg Temp
64°F
L:63° H:64°
RunScore
6
Conditions
Rain Freq
0%
0 of 5 yrs
Wind1mph
Dew61°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2024
partly-cloudy-night
64°/64°-
5
2023
partly-cloudy-night
66°/68°-
5
2019
clear-night
61°/63°-
6
2017
clear-night
57°/59°-
7
2016
partly-cloudy-night
68°/68°-
4