10/100 Easy

Difficulty

Marathon Index Score

2026 edition held Sep 20, 2026

Next edition expected

Usually September

2027 date not yet confirmed

Weather: Buenos Aires Marathon

Typical climate in September (an estimate, not measured race-day data). Use it to plan your race strategy, clothing, and hydration.

Racing conditions: Ideal

Typical climate for the race month — an estimate, not a forecast or a race-day record

15°C

Temperature

Range: 11°C – 20°C

70%

Humidity

Moderate

25%

Rain Chance

Low chance of rain

September

Typical race month

Usually on a Sunday

Conditions

September in Buenos Aires is cool: highs average about 20°C and lows about 11°C, with humidity near 70% and rain on around seven days of the month.

What to Wear

Singlet or short sleeve

Ideal racing temperatures

Hydration Strategy

Before the Race

Normal hydration. Drink to thirst in the 24 hours before. Avoid over-hydrating.

During the Race

Drink at aid stations every 3-4km. Alternate water and sports drink.

After the Race

Rehydrate within 30 minutes of finishing. A drink with electrolytes and some protein helps recovery.

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