San Antonio Marathon

San Antonio, TX, USA · December 6, 2026
partly-cloudy-day49°·64° high·Breezy·Dry
9
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Race Day Weather

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49°at start
65° high
Breezy
Dry

Cool start, gradual warm-up

Runners will face a start-line temperature of 49°F, rising to 65°F by race end. A light headwind at 9 mph may create slight resistance, while humidity levels at 62% suggest moderate comfort. To maintain optimal performance, runners should pace conservatively in the early miles and hydrate regularly.

Race day forecast available in 173 days
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Race Info

As the 7th largest city in the US, San Antonio is ready for a world-class marathon. San Antonio Sports, in partnership with the City of San Antonio, and marathon industry experts from The Trust Group and Boston Marathon winner, Meb Keflezighi, is thrilled to introduce the San Antonio Marathon. Now, with an incredible opportunity to elevate San Antonio’s premier running experience we aim to reflect the vibrant cultural spirit and uniqueness of our community. Join us in the celebration of a new running tradition where every step tells a story. Source

Area Map

Course Map

FAQ

When is the 2026 San Antonio Marathon?

The 2026 San Antonio Marathon will be held on Sunday December 6, 2026.

Is the San Antonio Marathon a Boston Marathon Qualifier?

Yes, the San Antonio Marathon is an official Boston Marathon qualifier.

What is the time limit for the San Antonio Marathon?

The time limit for the San Antonio Marathon is 7 hours.

What will the weather be like for the 2026 San Antonio Marathon?

The forecast calls for a high of 69°F and a low of 49°F with a 8% chance of rain.

Historical Weather

Based on 1 years of data
Avg Temp
80°F
L:61° H:80°
RunScore
7
Conditions
Rain Freq
0%
0 of 1 yrs
Wind11mph
Dew43°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScore
2025
cloudy
61°/80°-
8