Geneva Marathon: race-day weather at past editions
Geneva Marathon: at 9:00 on race day the temperature averaged 13 °C over 18 editions with known dates from 2005 to 2024 (from 8 °C to 20 °C); rain fell during race hours (08:00–14:00) in 8 editions (44%). Source: ERA5 reanalysis (Copernicus), data to 2024.
13 °Caverage at 9:00 on race day
8 / 18editions with rain 08–14 h
5 / 18editions with ≥ 20 °C by 14:00
27 °C (2022)warmest race morning–midday
Climate, not a forecast: these are statistics of past weather, not a forecast for the next edition.
Climate of the usual dates
Weather around the usual race date (7 May, ± 3 days) in 1991–2025:
- 13 °C — average temperature at 9:00
- 34% — share of mornings with rain 08–14 h
- 19 °C — average daily maximum
Average daily maximum on these dates: 18.1 °C in 1991–2005, 19.4 °C in 2011–2025.
Weather at past editions
| Year | Date | 9:00 | Max 08–14 | Rain 08–14 |
|---|---|---|---|---|
| 2024 | 5 May | 14 °C | 20 °C | 1.1 mm |
| 2023 | 20 May | 14 °C | 19 °C | 1.4 mm |
| 2022 | 15 May | 20 °C | 27 °C | 0.0 mm |
| 2021 | 2 May | 8 °C | 11 °C | 0.6 mm |
| 2019 | 12 May | 11 °C | 14 °C | 0.0 mm |
| 2018 | 6 May | 19 °C | 25 °C | 0.0 mm |
| 2017 | 7 May | 11 °C | 13 °C | 2.1 mm |
| 2016 | 8 May | 16 °C | 23 °C | 0.0 mm |
| 2015 | 3 May | 15 °C | 19 °C | 6.9 mm |
| 2014 | 4 May | 8 °C | 13 °C | 0.0 mm |
| 2013 | 5 May | 13 °C | 18 °C | 0.0 mm |
| 2012 | 6 May | 12 °C | 16 °C | 2.4 mm |
| 2011 | 15 May | 12 °C | 14 °C | 1.3 mm |
| 2010 | 9 May | 13 °C | 16 °C | 0.3 mm |
| 2009 | 11 May | 16 °C | 23 °C | 0.3 mm |
| 2007 | 6 May | 13 °C | 17 °C | 0.1 mm |
| 2006 | 7 May | 14 °C | 18 °C | 2.2 mm |
| 2005 | 8 May | 10 °C | 15 °C | 0.0 mm |
How to read these numbers
- ERA5 gives daytime highs about 1–2.5 °C below nearby weather stations, so on warm race days runners felt more heat than the numbers here show; we do not correct for this.
- Edition window: the race day; 9:00 local time is taken as the typical start.
- No dates found for 2008: these editions are not counted.
- Dates of past editions: Wikidata and Wikipedia (de, en, fr, nl); cancelled editions (e.g. 2020–21) are not counted.
Dates and sources
Coordinates: 46.200, 6.150; ERA5 cell centred at 46.25, 6.25 (average ground height of the cell 769 m).