EuroVelo 6 - Atlantic-Black Sea - part Switzerland: which way and when to ride
The best month for EuroVelo 6 - Atlantic-Black Sea - part Switzerland is September: 76% of days were dry with highs of 10–30 °C. In September the wind barely favours either direction — on average 0.5 km/h along the route (ERA5 2006–2025, daytime 9:00–18:00).
Also passes through Germany
Weather by month
| Month | Good days | Rain days ≥ 1 mm | Rain, mm | Avg high | Days ≥ 30 °C | Days < 10 °C | Daylight, h |
|---|---|---|---|---|---|---|---|
| January | 5% | 25% | 89 | 4 °C | 0% | 92% | 8.8 † |
| February | 19% | 24% | 64 | 6 °C | 0% | 77% | 10.2 † |
| March | 43% | 29% | 79 | 10 °C | 0% | 46% | 11.8 |
| April | 61% | 30% | 81 | 15 °C | 0% | 20% | 13.6 |
| May | 59% | 41% | 128 | 18 °C | 1% | 4% | 15.1 |
| June | 57% | 37% | 119 | 23 °C | 7% | 0% | 16.0 |
| July | 55% | 34% | 120 | 25 °C | 14% | 0% | 15.6 |
| August | 56% | 33% | 125 | 24 °C | 12% | 0% | 14.2 |
| September | 76% | 24% | 87 | 20 °C | 0% | 0% | 12.5 |
| October | 67% | 24% | 81 | 14 °C | 0% | 15% | 10.8 † |
| November | 25% | 25% | 85 | 8 °C | 0% | 67% | 9.2 † |
| December | 5% | 30% | 99 | 4 °C | 0% | 91% | 8.4 † |
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 Weil am Rhein → Öhningen, km/h | Headwind > 15 km/h, Weil am Rhein → Öhningen | Headwind > 15 km/h, Öhningen → Weil am Rhein | Better way |
|---|---|---|---|---|
| January | +2.3 | 1% | 8% | Weil am Rhein → Öhningen |
| February | +1.3 | 3% | 6% | either |
| March | +1.5 | 3% | 9% | either |
| April | +0.5 | 2% | 4% | either |
| May | +1.3 | 2% | 4% | either |
| June | +1.0 | 1% | 2% | either |
| July | +2.4 | 1% | 4% | Weil am Rhein → Öhningen |
| August | +2.1 | 0% | 3% | Weil am Rhein → Öhningen |
| September | +0.5 | 2% | 3% | either |
| October | +0.4 | 1% | 3% | either |
| November | +1.5 | 1% | 4% | either |
| December | +2.2 | 1% | 5% | Weil am Rhein → Öhningen |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in September, km/h |
|---|---|---|
| 0–25 | E | +1.0 |
| 25–52 | E | +0.7 |
| 52–77 | NE | +0.1 |
| 77–102 | E | +0.7 |
| 102–128 | NE | −0.2 |
| 128–153 | E | +0.7 |
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.