La Véloscénie, stage 1: near Pontorson → Domfront
On stage 1 (near Pontorson → Domfront, 98 km) the best month is September: 78% of days were dry with highs of 10–30 °C, and riding near Pontorson → Domfront meant an average tailwind of 3.0 km/h (ERA5 2006–2025, 9:00–18:00).
Weather by month
| Month | Good days | Rain days ≥ 1 mm | Rain, mm | Avg high | Days ≥ 30 °C | Days < 10 °C | Daylight, h |
|---|---|---|---|---|---|---|---|
| January | 12% | 30% | 95 | 7 °C | 0% | 75% | 8.7 † |
| February | 24% | 27% | 73 | 9 °C | 0% | 64% | 10.1 † |
| March | 46% | 29% | 72 | 11 °C | 0% | 38% | 11.7 |
| April | 68% | 25% | 57 | 14 °C | 0% | 10% | 13.6 |
| May | 71% | 29% | 74 | 17 °C | 0% | 1% | 15.2 |
| June | 72% | 25% | 64 | 20 °C | 2% | 0% | 16.1 |
| July | 73% | 24% | 64 | 22 °C | 4% | 0% | 15.7 |
| August | 75% | 22% | 63 | 22 °C | 3% | 0% | 14.3 |
| September | 78% | 21% | 61 | 20 °C | 1% | 0% | 12.5 |
| October | 71% | 27% | 89 | 16 °C | 0% | 2% | 10.7 † |
| November | 50% | 30% | 95 | 11 °C | 0% | 29% | 9.1 † |
| December | 19% | 30% | 104 | 8 °C | 0% | 62% | 8.3 † |
Best months are all months within 3 percentage points of the best one. † less than 11 hours of daylight — long stages get tight.
Wind by month
| Month | Wind near Pontorson → Domfront, km/h | Headwind > 15 km/h, near Pontorson → Domfront | Headwind > 15 km/h, Domfront → near Pontorson | Better way |
|---|---|---|---|---|
| January | +4.1 | 4% | 18% | near Pontorson → Domfront |
| February | +3.5 | 5% | 18% | near Pontorson → Domfront |
| March | +2.2 | 6% | 16% | near Pontorson → Domfront |
| April | +0.6 | 5% | 9% | either |
| May | +2.9 | 4% | 13% | near Pontorson → Domfront |
| June | +3.1 | 3% | 8% | near Pontorson → Domfront |
| July | +6.2 | 1% | 13% | near Pontorson → Domfront |
| August | +6.0 | 1% | 13% | near Pontorson → Domfront |
| September | +3.0 | 4% | 11% | near Pontorson → Domfront |
| October | +1.9 | 5% | 12% | either |
| November | +3.5 | 3% | 15% | near Pontorson → Domfront |
| December | +4.0 | 4% | 17% | near Pontorson → Domfront |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in September, km/h |
|---|---|---|
| 0–26 | E | +4.6 |
| 26–51 | E | +2.5 |
| 51–73 | E | +2.3 |
| 73–98 | E | +2.4 |
Other stages
- near Pontorson → Domfront 98 km
- Domfront → Mortagne-au-Perche 113 km
- Mortagne-au-Perche → Chartres 114 km
- Chartres → Antony 112 km
- Antony → Paris 72 km
How to read the numbers
Wind is the 10 m wind of a 25-km grid cell, daytime hours 9:00–18:00 local solar time; at saddle height in a sheltered valley it is weaker, on a coast or ridge stronger. A positive value is a tailwind. ERA5 slightly over-counts days with ≥ 1 mm of rain (by about 5–7 percentage points) and underestimates daily highs by 1–2 °C. Good day = less than 1 mm of rain between 9:00 and 18:00 (riding hours, local solar time) and a high between 10 and 30 °C; rain at night or in the evening does not spoil it.