Véloroute de la Baïse: which way and when to ride
The best month for Véloroute de la Baïse is October: 80% of days were dry with highs of 10–30 °C. In October the wind barely favours either direction — on average 0.9 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 | 39% | 26% | 82 | 10 °C | 0% | 49% | 9.3 † |
| February | 56% | 23% | 62 | 12 °C | 0% | 29% | 10.4 † |
| March | 66% | 27% | 74 | 15 °C | 0% | 13% | 11.8 |
| April | 71% | 28% | 82 | 18 °C | 0% | 2% | 13.4 |
| May | 68% | 30% | 100 | 21 °C | 2% | 0% | 14.7 |
| June | 63% | 24% | 91 | 25 °C | 15% | 0% | 15.4 |
| July | 57% | 15% | 54 | 28 °C | 30% | 0% | 15.1 |
| August | 56% | 13% | 52 | 28 °C | 33% | 0% | 14.0 |
| September | 69% | 17% | 57 | 25 °C | 15% | 0% | 12.4 |
| October | 80% | 18% | 64 | 21 °C | 2% | 1% | 10.9 † |
| November | 61% | 28% | 95 | 14 °C | 0% | 16% | 9.6 † |
| December | 50% | 23% | 70 | 11 °C | 0% | 37% | 8.9 † |
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 Vianne → La Barthe-de-Neste, km/h | Headwind > 15 km/h, Vianne → La Barthe-de-Neste | Headwind > 15 km/h, La Barthe-de-Neste → Vianne | Better way |
|---|---|---|---|---|
| January | +0.4 | 0% | 1% | either |
| February | +1.2 | 1% | 2% | either |
| March | +1.8 | 1% | 2% | either |
| April | +2.3 | 0% | 1% | Vianne → La Barthe-de-Neste |
| May | +3.0 | 0% | 1% | Vianne → La Barthe-de-Neste |
| June | +3.3 | 0% | 1% | Vianne → La Barthe-de-Neste |
| July | +3.6 | 0% | 0% | Vianne → La Barthe-de-Neste |
| August | +3.4 | 0% | 0% | Vianne → La Barthe-de-Neste |
| September | +2.3 | 0% | 1% | Vianne → La Barthe-de-Neste |
| October | +0.9 | 1% | 1% | either |
| November | +0.2 | 1% | 1% | either |
| December | −0.5 | 0% | 1% | either |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in October, km/h |
|---|---|---|
| 0–10 | S | −0.6 |
| 10–35 | S | +0.1 |
| 35–61 | S | +0.1 |
| 61–86 | S | +0.5 |
| 86–111 | S | +0.9 |
| 111–136 | S | +1.9 |
| 136–162 | S | +2.2 |
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.