P'tites Routes du Soleil, stage 4: Villard-de-Lans → near Veynes
On stage 4 (Villard-de-Lans → near Veynes, 120 km) the best month is September: 77% of days were dry with highs of 10–30 °C, and riding Villard-de-Lans → near Veynes meant an average tailwind of 3.3 km/h (ERA5 2006–2025, 9:00–18:00).
← P'tites Routes du Soleil (Whole route)
Weather by month
| Month | Good days | Rain days ≥ 1 mm | Rain, mm | Avg high | Days ≥ 30 °C | Days < 10 °C | Daylight, h |
|---|---|---|---|---|---|---|---|
| January | 10% | 25% | 96 | 5 °C | 0% | 89% | 9.2 † |
| February | 24% | 24% | 78 | 7 °C | 0% | 74% | 10.4 † |
| March | 46% | 29% | 98 | 10 °C | 0% | 45% | 11.8 |
| April | 55% | 36% | 96 | 14 °C | 0% | 17% | 13.4 |
| May | 59% | 40% | 132 | 17 °C | 0% | 5% | 14.8 |
| June | 64% | 34% | 98 | 22 °C | 3% | 0% | 15.6 |
| July | 70% | 24% | 73 | 24 °C | 7% | 0% | 15.2 |
| August | 70% | 21% | 73 | 24 °C | 10% | 0% | 14.0 |
| September | 77% | 23% | 87 | 20 °C | 0% | 1% | 12.4 |
| October | 72% | 21% | 103 | 16 °C | 0% | 10% | 10.9 † |
| November | 40% | 27% | 127 | 9 °C | 0% | 51% | 9.5 † |
| December | 14% | 28% | 117 | 6 °C | 0% | 83% | 8.8 † |
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 Villard-de-Lans → near Veynes, km/h | Headwind > 15 km/h, Villard-de-Lans → near Veynes | Headwind > 15 km/h, near Veynes → Villard-de-Lans | Better way |
|---|---|---|---|---|
| January | +3.2 | 1% | 7% | Villard-de-Lans → near Veynes |
| February | +3.2 | 2% | 10% | Villard-de-Lans → near Veynes |
| March | +3.4 | 3% | 12% | Villard-de-Lans → near Veynes |
| April | +2.8 | 4% | 11% | Villard-de-Lans → near Veynes |
| May | +3.2 | 2% | 13% | Villard-de-Lans → near Veynes |
| June | +2.8 | 2% | 10% | Villard-de-Lans → near Veynes |
| July | +4.3 | 2% | 12% | Villard-de-Lans → near Veynes |
| August | +4.0 | 1% | 11% | Villard-de-Lans → near Veynes |
| September | +3.3 | 1% | 9% | Villard-de-Lans → near Veynes |
| October | +1.3 | 3% | 7% | either |
| November | +1.7 | 2% | 6% | either |
| December | +2.1 | 1% | 5% | Villard-de-Lans → near Veynes |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in September, km/h |
|---|---|---|
| 352–377 | SW | +1.2 |
| 377–402 | S | +2.6 |
| 402–427 | S | +4.7 |
| 427–452 | SE | +4.0 |
| 452–472 | SE | +3.9 |
Other stages
- Thonon-les-Bains → Rumilly 138 km
- Rumilly → Saint-Christophe-sur-Guiers 119 km
- Saint-Christophe-sur-Guiers → Villard-de-Lans 96 km
- Villard-de-Lans → near Veynes 120 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.