EuroVelo 9 - Baltic-Adriatic - part Czech Republic: which way and when to ride
The best month for EuroVelo 9 - Baltic-Adriatic - part Czech Republic is September: 77% of days were dry with highs of 10–30 °C. In September the wind barely favours either direction — on average 0.1 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% | 17% | 43 | 1 °C | 0% | 97% | 8.6 † |
| February | 9% | 16% | 35 | 4 °C | 0% | 90% | 10.1 † |
| March | 35% | 19% | 43 | 9 °C | 0% | 61% | 11.7 |
| April | 66% | 21% | 44 | 14 °C | 0% | 23% | 13.7 |
| May | 68% | 30% | 77 | 18 °C | 0% | 4% | 15.3 |
| June | 65% | 30% | 86 | 23 °C | 6% | 0% | 16.2 |
| July | 59% | 29% | 85 | 25 °C | 14% | 0% | 15.9 |
| August | 63% | 26% | 87 | 24 °C | 13% | 0% | 14.4 |
| September | 77% | 21% | 81 | 19 °C | 1% | 2% | 12.5 |
| October | 66% | 17% | 48 | 13 °C | 0% | 24% | 10.7 † |
| November | 23% | 16% | 44 | 7 °C | 0% | 73% | 9.0 † |
| December | 2% | 16% | 40 | 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 Mikulovice → Břeclav (Poštorná), km/h | Headwind > 15 km/h, Mikulovice → Břeclav (Poštorná) | Headwind > 15 km/h, Břeclav (Poštorná) → Mikulovice | Better way |
|---|---|---|---|---|
| January | −1.5 | 8% | 6% | either |
| February | −0.4 | 8% | 8% | either |
| March | +0.3 | 8% | 9% | either |
| April | +1.3 | 7% | 10% | either |
| May | +1.4 | 6% | 9% | either |
| June | +1.9 | 4% | 7% | either |
| July | +1.4 | 3% | 6% | either |
| August | 0.0 | 4% | 3% | either |
| September | +0.1 | 5% | 6% | either |
| October | −2.2 | 9% | 5% | Břeclav (Poštorná) → Mikulovice |
| November | −3.4 | 10% | 4% | Břeclav (Poštorná) → Mikulovice |
| December | −2.9 | 9% | 4% | Břeclav (Poštorná) → Mikulovice |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in September, km/h |
|---|---|---|
| 0–25 | SW | −2.0 |
| 25–50 | SW | −1.5 |
| 50–75 | S | −0.4 |
| 75–101 | S | +0.3 |
| 101–126 | SE | +1.3 |
| 126–151 | SW | +0.2 |
| 151–177 | W | −0.4 |
| 177–202 | SW | 0.0 |
| 202–227 | S | +0.7 |
| 227–253 | S | +0.7 |
| 253–278 | S | +0.7 |
| 278–304 | S | +0.7 |
| 304–329 | E | +0.4 |
| 329–347 | SE | +0.7 |
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.