10/100 Easy

Difficulty

Marathon Index Score

2026 edition held Sep 27, 2026

Next edition expected

Usually September

2027 date not yet confirmed

Weather: Warsaw 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

14°C

Temperature

Range: 10°C – 19°C

79%

Humidity

High — increase hydration

27%

Rain Chance

Low chance of rain

September

Typical race month

Usually on a Sunday

Conditions

Late September in Warsaw is mild: average highs are around 19°C and lows around 9–10°C, with rain of 1 mm or more on about 8 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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