Weather: Dublin Half Marathon
Historical weather data for race day in September. Use this to plan your race strategy, clothing, and hydration.
🌡️
15°C
Temperature
Range: 11°C – 19°C
💧
75%
Humidity
Moderate
🌧️
45%
Rain Chance
Possible — check forecast
📅
September
Typical race month
Usually on a Sunday
📝 Conditions
Early autumn weather in Dublin tends to be mild and cool with occasional rain. Runners should expect variable conditions typical of Irish September, with temperatures in the mid-teens and a moderate chance of showers.
👟 What to Wear
Singlet or short sleeve
Ideal racing temperatures
Hat with brim
Keep rain out of your eyes
Anti-chafe cream
Wet conditions increase chafing risk
💧 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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