48 Hevlín - Slavonice: which way and when to ride
The best month for 48 Hevlín - Slavonice is September: 80% 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 Austria
Weather by month
| Month | Good days | Rain days ≥ 1 mm | Rain, mm | Avg high | Days ≥ 30 °C | Days < 10 °C | Daylight, h |
|---|---|---|---|---|---|---|---|
| January | 5% | 14% | 35 | 2 °C | 0% | 95% | 8.7 † |
| February | 13% | 12% | 27 | 4 °C | 0% | 85% | 10.1 † |
| March | 39% | 16% | 36 | 9 °C | 0% | 56% | 11.7 |
| April | 68% | 21% | 40 | 15 °C | 0% | 20% | 13.6 |
| May | 70% | 28% | 74 | 18 °C | 0% | 3% | 15.2 |
| June | 67% | 27% | 82 | 23 °C | 7% | 0% | 16.1 |
| July | 59% | 27% | 80 | 25 °C | 17% | 0% | 15.8 |
| August | 64% | 23% | 76 | 25 °C | 14% | 0% | 14.4 |
| September | 80% | 19% | 73 | 20 °C | 1% | 1% | 12.5 |
| October | 68% | 16% | 40 | 13 °C | 0% | 22% | 10.7 † |
| November | 23% | 13% | 36 | 7 °C | 0% | 75% | 9.1 † |
| December | 4% | 14% | 35 | 3 °C | 0% | 95% | 8.3 † |
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 Hevlín → Slavonice, km/h | Headwind > 15 km/h, Hevlín → Slavonice | Headwind > 15 km/h, Slavonice → Hevlín | Better way |
|---|---|---|---|---|
| January | −3.9 | 20% | 5% | Slavonice → Hevlín |
| February | −3.1 | 19% | 6% | Slavonice → Hevlín |
| March | −2.7 | 17% | 8% | Slavonice → Hevlín |
| April | −0.9 | 13% | 7% | either |
| May | −0.5 | 11% | 9% | either |
| June | −1.8 | 10% | 3% | either |
| July | −4.0 | 14% | 2% | Slavonice → Hevlín |
| August | −1.6 | 7% | 2% | either |
| September | −0.8 | 10% | 6% | either |
| October | −0.4 | 11% | 8% | either |
| November | −0.5 | 13% | 8% | either |
| December | −2.6 | 16% | 6% | Slavonice → Hevlín |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in September, km/h |
|---|---|---|
| 0–25 | W | −0.3 |
| 25–51 | NW | −0.8 |
| 51–77 | W | −0.5 |
| 77–102 | NW | −1.3 |
| 102–109 | W | −1.2 |
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.