Semi-marathon de Boulogne-billancourt Christian Granger weather.
Typically 8°C on race morning; rain in 2 of the last 10 years. Race morning (07:00 to 11:00 local time) in Boulogne-Billancourt on race day in each of the last 10 years; the 2026 race is on 15 Nov 2026.
- Typical
- 8°C (46°F)
- race-morning average
- Coolest
- 0°C (32°F)
- lowest reading, 07:00–11:00
- Warmest
- 15°C (59°F)
- highest reading, 07:00–11:00
- Wet years
- 2 of 10
- rain, drizzle or worse
- Humidity
- 91%
- typical
- Wind
- 12 km/h
- typical, at 10 m
Race morning, 07:00–11:00
Year by year
| Race day | Average | Low–high | Humidity | Wind | Rain | Conditions |
|---|---|---|---|---|---|---|
| 16 Nov 2025 | 8°C (47°F) | 8°C (46°F)–9°C (48°F) | 100% | 5 km/h | 0.0 mm | Overcast |
| 17 Nov 2024 | 7°C (45°F) | 7°C (44°F)–8°C (46°F) | 84% | 12 km/h | 0.2 mm | Overcast |
| 12 Nov 2023 | 7°C (44°F) | 6°C (43°F)–7°C (45°F) | 89% | 15 km/h | 4.2 mm | Heavy drizzle |
| 13 Nov 2022 | 8°C (47°F) | 8°C (46°F)–9°C (48°F) | 98% | 7 km/h | 0.0 mm | Overcast |
| 14 Nov 2021 | 10°C (49°F) | 9°C (49°F)–10°C (50°F) | 93% | 12 km/h | 0.0 mm | Overcast |
| 15 Nov 2020 | 14°C (58°F) | 14°C (57°F)–15°C (59°F) | 75% | 29 km/h | 0.0 mm | Overcast |
| 17 Nov 2019 | 2°C (35°F) | 0°C (32°F)–3°C (37°F) | 97% | 5 km/h | 0.0 mm | Overcast |
| 18 Nov 2018 | 2°C (36°F) | 2°C (35°F)–4°C (39°F) | 72% | 15 km/h | 0.0 mm | Clear |
| 12 Nov 2017 | 11°C (52°F) | 10°C (50°F)–12°C (53°F) | 89% | 33 km/h | 5.9 mm | Light drizzle |
| 13 Nov 2016 | 8°C (46°F) | 8°C (46°F)–8°C (46°F) | 97% | 10 km/h | 0.0 mm | Overcast |
Each row is the race's date that year where we know it, else the same weekday nearest its usual date. Temperatures and humidity are averaged over 07:00 to 11:00 local time, rain is the total over those hours, and conditions are the commonest over the morning.
Kit and pacing
What it means
Good racing weather
Around 8°C is close to ideal for a fast time. Shorts and a vest are enough once you're moving; bring a throwaway layer for the wait in the start pen.
It can be cold
The coolest morning here dropped to 0°C. Pack gloves and a throwaway layer even if the forecast looks kind.
The weather varies a lot
Race mornings here have ranged by 13°C from year to year. Pack for both, and settle your kit and pacing from the forecast in the last few days.
General guidance from past years' numbers. Check the forecast in race week.
Weather data by Open-Meteo.com, from its historical weather archive (CC BY 4.0).