Buenos Aires Marathon 2025
Buenos Aires · September 21, 2025 · 12,773 finishers
- Where the field cracked
- 35 km
- Negative splits
- 19.3%
- Median finish
- 4:02:37
- Finishers
- 12,773
Largest drop in pace between two mats.
Share of the field that ran the second half faster.
Fade, by finish time
Fade tracks ability, so a single field-wide median would compare you against people running a different race. Each band below is the median for runners who finished near your time.
| Band | Median fade |
|---|---|
| <3:00 | 1.7% |
| 3:00-3:30 | 2.5% |
| 3:30-4:00 | 2.8% |
| 4:00-4:30 | 5.2% |
| 4:30-5:00 | 9.7% |
| >5:00 | 17.5% |
Race conditions
- Temp.
- 12.0°C – 16.1°C
- Humidity at peak
- 66%
- Wind
- 17 km/h – 23 km/h
Temperature ran from 12.0°C to 16.1°C. At its hottest, the air was at 66% humidity.
Hour by hour
| Hour | Temp. | Humidity | Wind |
|---|---|---|---|
| 06:00 | 12.2°C | 96% | 17 km/h |
| 07:00 | 12.0°C | 94% | 18 km/h |
| 08:00 | 12.3°C | 89% | 17 km/h |
| 09:00 | 13.0°C | 83% | 22 km/h |
| 10:00 | 13.9°C | 79% | 22 km/h |
| 11:00 | 14.5°C | 75% | 20 km/h |
| 12:00 | 16.1°C | 66% | 23 km/h |
| 13:00 | 16.0°C | 66% | 22 km/h |
| 14:00 | 15.9°C | 66% | 21 km/h |
Hourly data from open-meteo. Peak wind 23 km/h. Times in the race's own zone.