Mlynářská stezka: which way and when to ride
The best month for Mlynářská stezka is September: 79% of days were dry with highs of 10–30 °C. In September the wind barely favours either direction — on average 0.5 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% | 15% | 38 | 1 °C | 0% | 96% | 8.6 † |
| February | 8% | 14% | 29 | 4 °C | 0% | 90% | 10.1 † |
| March | 33% | 19% | 39 | 8 °C | 0% | 62% | 11.7 |
| April | 65% | 22% | 41 | 14 °C | 0% | 24% | 13.7 |
| May | 68% | 30% | 75 | 18 °C | 0% | 4% | 15.3 |
| June | 67% | 30% | 81 | 23 °C | 4% | 0% | 16.2 |
| July | 61% | 29% | 84 | 25 °C | 11% | 0% | 15.8 |
| August | 65% | 25% | 80 | 24 °C | 10% | 0% | 14.4 |
| September | 79% | 20% | 75 | 19 °C | 1% | 2% | 12.5 |
| October | 63% | 17% | 43 | 13 °C | 0% | 26% | 10.7 † |
| November | 20% | 15% | 39 | 7 °C | 0% | 78% | 9.0 † |
| December | 2% | 16% | 36 | 3 °C | 0% | 97% | 8.2 † |
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 Nové Město na Moravě → Hardegg, km/h | Headwind > 15 km/h, Nové Město na Moravě → Hardegg | Headwind > 15 km/h, Hardegg → Nové Město na Moravě | Better way |
|---|---|---|---|---|
| January | −0.8 | 6% | 5% | either |
| February | +0.3 | 6% | 7% | either |
| March | +0.8 | 7% | 8% | either |
| April | +1.7 | 5% | 9% | either |
| May | +1.6 | 5% | 8% | either |
| June | +2.0 | 3% | 6% | Nové Město na Moravě → Hardegg |
| July | +1.4 | 2% | 5% | either |
| August | +0.2 | 3% | 3% | either |
| September | +0.5 | 4% | 6% | either |
| October | −1.1 | 7% | 4% | either |
| November | −2.2 | 8% | 3% | Hardegg → Nové Město na Moravě |
| December | −1.7 | 6% | 4% | either |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in September, km/h |
|---|---|---|
| 0–25 | S | +0.1 |
| 25–50 | S | +0.4 |
| 50–76 | SE | +1.1 |
| 76–101 | S | +0.9 |
| 101–126 | W | 0.0 |
| 126–151 | SW | +0.6 |
| 151–174 | SW | +0.5 |
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.