-->

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.

Submit Your Prediction

Best Boston Marathon Qualifiers

It's here! Our annual list of the year's
best marathons to help you qualify for the Boston Marathon.

2026 IS HERE!

Marathon Pace Bands

Run the Right Pace in Your Next Marathon

Nearly 500 marathon courses.
Ships same or Next Day

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 63°F 17°C

Start Humidity 87% Humidity

Wind NE 9 mph

Race day high 71°F 22°C

Race day low 61°F 16°C

PR Score 97.81 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