Festival Weather Odds

Festival and marathon weather in Denmark

3 festivals and races in Denmark with at least 10 dated editions since 1991, with the weather of every past edition from ERA5 (1991–2025).

Data updated: 2 November 2026 · Sources, licences and data

Calculated 3 November 2026 · weather: ERA5 1991–2025 · edition dates checked 2 November 2026

Music festivals

EventCountryUsual datesRain on ≥ 1 dayDay ≥ 30 °CEditions
Roskilde FestivalDenmarkDenmark1–4 July72%3%32

Marathons and half marathons

EventCountryUsual datesAvg at 9:00Rain in race hoursEditions
Copenhagen MarathonDenmarkDenmark20 May13 °C15%33
H.C. Andersen MarathonDenmarkDenmark28 September11 °C16%25

Climate, not a forecast: these are statistics of past weather, not a forecast for the next edition.

How we calculate