Voie Verte Trans-Ardennes: which way and when to ride
The best month for Voie Verte Trans-Ardennes is September: 75% of days were dry with highs of 10–30 °C. In September the wind barely favours either direction — on average 1.7 km/h along the route (ERA5 2006–2025, daytime 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 | 3% | 30% | 93 | 4 °C | 0% | 92% | 8.5 † |
| February | 12% | 29% | 76 | 6 °C | 0% | 84% | 10.0 † |
| March | 38% | 30% | 78 | 10 °C | 0% | 52% | 11.7 |
| April | 60% | 28% | 58 | 14 °C | 0% | 22% | 13.7 |
| May | 64% | 34% | 79 | 17 °C | 0% | 4% | 15.4 |
| June | 67% | 31% | 84 | 21 °C | 2% | 0% | 16.3 |
| July | 67% | 28% | 80 | 23 °C | 6% | 0% | 15.9 |
| August | 64% | 30% | 87 | 22 °C | 6% | 0% | 14.4 |
| September | 75% | 24% | 71 | 19 °C | 1% | 0% | 12.5 |
| October | 65% | 25% | 83 | 14 °C | 0% | 12% | 10.6 † |
| November | 22% | 32% | 81 | 9 °C | 0% | 64% | 8.9 † |
| December | 5% | 30% | 100 | 6 °C | 0% | 88% | 8.1 † |
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 Givet → Mouzon, km/h | Headwind > 15 km/h, Givet → Mouzon | Headwind > 15 km/h, Mouzon → Givet | Better way |
|---|---|---|---|---|
| January | −4.2 | 20% | 5% | Mouzon → Givet |
| February | −3.9 | 19% | 7% | Mouzon → Givet |
| March | −1.4 | 14% | 9% | either |
| April | +0.2 | 10% | 9% | either |
| May | +0.8 | 8% | 9% | either |
| June | +0.8 | 6% | 7% | either |
| July | −0.1 | 7% | 5% | either |
| August | −1.2 | 8% | 4% | either |
| September | −1.7 | 10% | 5% | either |
| October | −4.6 | 18% | 4% | Mouzon → Givet |
| November | −5.7 | 22% | 4% | Mouzon → Givet |
| December | −5.4 | 21% | 4% | Mouzon → Givet |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in September, km/h |
|---|---|---|
| 0–25 | SW | −3.4 |
| 25–51 | S | −3.1 |
| 51–76 | SE | −1.1 |
| 76–101 | SE | −1.1 |
| 101–119 | SE | +1.1 |
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.