El Destierro: which way and when to ride
The best month for El Destierro is October: 81% of days were dry with highs of 10–30 °C. In October the wind barely favours either direction — on average 0.3 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 | 23% | 23% | 56 | 8 °C | 0% | 73% | 9.5 † |
| February | 44% | 23% | 52 | 10 °C | 0% | 51% | 10.5 † |
| March | 54% | 27% | 62 | 12 °C | 0% | 35% | 11.8 |
| April | 63% | 33% | 70 | 16 °C | 0% | 11% | 13.3 |
| May | 72% | 26% | 59 | 20 °C | 1% | 2% | 14.5 |
| June | 62% | 24% | 50 | 25 °C | 17% | 0% | 15.2 |
| July | 44% | 11% | 16 | 29 °C | 49% | 0% | 14.9 |
| August | 47% | 8% | 15 | 29 °C | 48% | 0% | 13.8 |
| September | 79% | 13% | 32 | 24 °C | 8% | 0% | 12.4 |
| October | 81% | 18% | 58 | 19 °C | 0% | 3% | 11.0 |
| November | 54% | 22% | 62 | 12 °C | 0% | 34% | 9.8 † |
| December | 31% | 18% | 47 | 9 °C | 0% | 65% | 9.2 † |
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 Quintanilla-Vivar → Atienza, km/h | Headwind > 15 km/h, Quintanilla-Vivar → Atienza | Headwind > 15 km/h, Atienza → Quintanilla-Vivar | Better way |
|---|---|---|---|---|
| January | +1.8 | 5% | 10% | either |
| February | +1.7 | 7% | 12% | either |
| March | +1.3 | 9% | 13% | either |
| April | +0.9 | 7% | 8% | either |
| May | +1.9 | 4% | 8% | either |
| June | +1.1 | 4% | 4% | either |
| July | +1.8 | 2% | 5% | either |
| August | +1.7 | 2% | 5% | either |
| September | +1.0 | 3% | 4% | either |
| October | −0.3 | 7% | 5% | either |
| November | +1.0 | 8% | 10% | either |
| December | +0.4 | 5% | 7% | either |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in October, km/h |
|---|---|---|
| 0–25 | S | −1.6 |
| 25–50 | SE | +0.1 |
| 50–75 | SW | −3.9 |
| 75–100 | SE | −0.6 |
| 100–126 | SE | −0.1 |
| 126–151 | S | −1.8 |
| 151–178 | SE | +1.6 |
| 178–203 | W | −3.6 |
| 203–228 | SE | +1.3 |
| 228–254 | E | +3.7 |
| 254–279 | SE | +1.3 |
| 279–304 | SE | +2.5 |
| 304–330 | SW | −3.2 |
| 330–356 | SE | 0.0 |
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.