San Antonio Marathon

San Antonio, TX, USADecember 6, 2026
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Race Day Weather

partly-cloudy-day
51°
65° high
Breezy
Dry

Cool start, warming trend

Runners will face a temperature rise from 51°F to a peak of 65°F, with humidity at 64% and a dew point of 46°F. Winds will be light from the SE at 8 mph, with gusts up to 25 mph. Runners should start conservatively and hydrate frequently to maintain performance as temperatures climb.

Race day forecast available in 246 days
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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 65°F and a low of 51°F with a 0% 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