36 - Magistrála Český les: which way and when to ride
The best month for 36 - Magistrála Český les is September: 76% of days were dry with highs of 10–30 °C. In September the wind barely favours either direction — on average 0.8 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 | 1% | 26% | 65 | 1 °C | 0% | 99% | 8.6 † |
| February | 4% | 22% | 48 | 3 °C | 0% | 95% | 10.0 † |
| March | 28% | 25% | 54 | 8 °C | 0% | 68% | 11.7 |
| April | 57% | 27% | 51 | 13 °C | 0% | 30% | 13.7 |
| May | 63% | 34% | 83 | 17 °C | 0% | 8% | 15.3 |
| June | 66% | 32% | 78 | 21 °C | 3% | 1% | 16.3 |
| July | 63% | 32% | 86 | 23 °C | 6% | 0% | 15.9 |
| August | 65% | 30% | 88 | 22 °C | 6% | 0% | 14.4 |
| September | 76% | 23% | 65 | 18 °C | 0% | 3% | 12.5 |
| October | 55% | 22% | 55 | 12 °C | 0% | 32% | 10.6 † |
| November | 13% | 21% | 57 | 6 °C | 0% | 84% | 9.0 † |
| December | 1% | 23% | 63 | 2 °C | 0% | 98% | 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 Všeruby → Cheb, km/h | Headwind > 15 km/h, Všeruby → Cheb | Headwind > 15 km/h, Cheb → Všeruby | Better way |
|---|---|---|---|---|
| January | −0.7 | 6% | 2% | either |
| February | −0.6 | 5% | 2% | either |
| March | −1.3 | 6% | 2% | either |
| April | −1.5 | 5% | 1% | either |
| May | −1.4 | 5% | 2% | either |
| June | −2.0 | 4% | 0% | either |
| July | −2.5 | 3% | 0% | Cheb → Všeruby |
| August | −1.0 | 2% | 0% | either |
| September | −0.8 | 3% | 1% | either |
| October | 0.0 | 3% | 1% | either |
| November | +0.3 | 3% | 1% | either |
| December | +0.2 | 3% | 2% | either |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in September, km/h |
|---|---|---|
| 0–25 | W | −1.8 |
| 25–50 | N | −0.7 |
| 50–75 | N | −0.6 |
| 75–101 | N | 0.0 |
| 101–126 | N | 0.0 |
| 126–154 | NW | −1.8 |
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.