RAVeL W8 Entre Fagnes et Famenne: which way and when to ride
The best month for RAVeL W8 Entre Fagnes et Famenne is September: 76% of days were dry with highs of 10–30 °C. In September, riding Momignies → Barvaux meant an average tailwind of 3.7 km/h (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 | 4% | 30% | 86 | 5 °C | 0% | 90% | 8.5 † |
| February | 12% | 30% | 72 | 6 °C | 0% | 83% | 10.0 † |
| March | 38% | 29% | 72 | 10 °C | 0% | 52% | 11.7 |
| April | 61% | 27% | 53 | 14 °C | 0% | 22% | 13.7 |
| May | 67% | 32% | 76 | 17 °C | 0% | 4% | 15.4 |
| June | 68% | 30% | 83 | 21 °C | 2% | 0% | 16.4 |
| July | 66% | 29% | 80 | 22 °C | 5% | 0% | 16.0 |
| August | 64% | 31% | 86 | 22 °C | 5% | 0% | 14.5 |
| September | 76% | 24% | 65 | 19 °C | 1% | 0% | 12.5 |
| October | 66% | 25% | 76 | 14 °C | 0% | 12% | 10.6 † |
| November | 26% | 31% | 74 | 9 °C | 0% | 61% | 8.9 † |
| December | 7% | 30% | 90 | 6 °C | 0% | 86% | 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 Momignies → Barvaux, km/h | Headwind > 15 km/h, Momignies → Barvaux | Headwind > 15 km/h, Barvaux → Momignies | Better way |
|---|---|---|---|---|
| January | +7.2 | 3% | 28% | Momignies → Barvaux |
| February | +5.5 | 7% | 26% | Momignies → Barvaux |
| March | +3.3 | 9% | 21% | Momignies → Barvaux |
| April | +0.9 | 8% | 13% | either |
| May | +2.5 | 6% | 16% | Momignies → Barvaux |
| June | +3.1 | 4% | 15% | Momignies → Barvaux |
| July | +5.9 | 1% | 21% | Momignies → Barvaux |
| August | +5.9 | 1% | 18% | Momignies → Barvaux |
| September | +3.7 | 4% | 16% | Momignies → Barvaux |
| October | +4.9 | 3% | 20% | Momignies → Barvaux |
| November | +6.6 | 2% | 23% | Momignies → Barvaux |
| December | +7.7 | 3% | 28% | Momignies → Barvaux |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in September, km/h |
|---|---|---|
| 0–26 | E | +3.3 |
| 26–52 | E | +3.2 |
| 52–77 | NE | +4.0 |
| 77–102 | NE | +4.1 |
| 102–127 | E | +4.2 |
| 127–140 | E | +2.9 |
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.