EuroVelo 9 - Baltic-Adriatic - part Austria: which way and when to ride
The best month for EuroVelo 9 - Baltic-Adriatic - part Austria is September: 76% of days were dry with highs of 10–30 °C. In September the wind barely favours either direction — on average 0.2 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 | 8% | 15% | 39 | 3 °C | 0% | 92% | 8.8 † |
| February | 22% | 15% | 37 | 6 °C | 0% | 76% | 10.2 † |
| March | 49% | 16% | 44 | 11 °C | 0% | 44% | 11.8 |
| April | 70% | 21% | 50 | 16 °C | 0% | 15% | 13.6 |
| May | 66% | 33% | 96 | 19 °C | 0% | 2% | 15.1 |
| June | 61% | 30% | 93 | 24 °C | 11% | 0% | 16.0 |
| July | 54% | 28% | 86 | 26 °C | 21% | 0% | 15.6 |
| August | 58% | 26% | 92 | 26 °C | 19% | 0% | 14.3 |
| September | 76% | 22% | 92 | 21 °C | 2% | 1% | 12.5 |
| October | 74% | 17% | 57 | 15 °C | 0% | 14% | 10.8 † |
| November | 34% | 16% | 50 | 9 °C | 0% | 62% | 9.2 † |
| December | 6% | 14% | 41 | 4 °C | 0% | 93% | 8.4 † |
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 near Břeclav → Spielfeld, km/h | Headwind > 15 km/h, near Břeclav → Spielfeld | Headwind > 15 km/h, Spielfeld → near Břeclav | Better way |
|---|---|---|---|---|
| January | −0.5 | 3% | 4% | either |
| February | +0.3 | 4% | 6% | either |
| March | +0.7 | 6% | 8% | either |
| April | +0.9 | 6% | 8% | either |
| May | +1.3 | 4% | 7% | either |
| June | +1.2 | 3% | 5% | either |
| July | +0.7 | 2% | 3% | either |
| August | −0.1 | 2% | 2% | either |
| September | +0.2 | 3% | 4% | either |
| October | −1.1 | 5% | 3% | either |
| November | −1.8 | 5% | 2% | either |
| December | −1.0 | 3% | 3% | either |
Stages
The route is split into 3 stages of about 100–150 km between towns; each stage has its own page.
| Stage | km | Best month | Tailwind near Břeclav → Spielfeld in September, km/h |
|---|---|---|---|
| 1. near Břeclav → Vienna | 108 | September | +0.1 |
| 2. Vienna → Hartberg | 141 | September | +0.5 |
| 3. Hartberg → Spielfeld | 154 | October | +0.1 |
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.