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Boston Cut-off Time Prediction Contest

Predict the 2027 Boston Cut-off Time and win a great prize and bragging rights among all your running friends.

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Marathon Pace Bands

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Best Boston Marathon Qualifiers

It's here! Our annual list of the year's
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Historical weather

Historical Race Day Weather for the Buenos Aires Marathon

See historical race day weather for the Buenos Aires Marathon, including start temperature, humidity, wind, race day temperatures, PR score, and course score.

Weather Averages for Last 1 Years

Race day snapshot

Partially cloudy

Most common race morning weather across the last 1 years.

Start Line Conditions

Start Temp 60°F 16°C

Start Humidity 91% Humidity

Wind N 5 mph

Race day high 73°F 23°C

Race day low 59°F 15°C

PR Score 96.64 Weather-influenced race day scoring

Course Score 99.33 Course-only Score

Race Day Weather by Year

Most recent years appear first so you can quickly compare start conditions, temperatures, wind, and scores across different editions of the race.

September 20, 2026