EuroVelo 9 - Baltic-Adriatic - part Croatia: which way and when to ride
The best month for EuroVelo 9 - Baltic-Adriatic - part Croatia is September: 74% of days were dry with highs of 10–30 °C. In September the wind barely favours either direction — on average 0.6 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 | 17% | 23% | 105 | 8 °C | 0% | 73% | 9.1 † |
| February | 37% | 24% | 111 | 9 °C | 0% | 51% | 10.3 † |
| March | 62% | 24% | 109 | 12 °C | 0% | 20% | 11.8 |
| April | 73% | 26% | 89 | 16 °C | 0% | 3% | 13.4 |
| May | 68% | 32% | 121 | 20 °C | 0% | 0% | 14.8 |
| June | 71% | 23% | 79 | 25 °C | 7% | 0% | 15.6 |
| July | 62% | 17% | 72 | 28 °C | 22% | 0% | 15.3 |
| August | 61% | 18% | 94 | 27 °C | 22% | 0% | 14.1 |
| September | 74% | 26% | 166 | 23 °C | 0% | 0% | 12.5 |
| October | 73% | 26% | 145 | 18 °C | 0% | 1% | 10.8 † |
| November | 54% | 31% | 177 | 13 °C | 0% | 17% | 9.4 † |
| December | 28% | 24% | 125 | 9 °C | 0% | 58% | 8.8 † |
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 Pula → Parecag, km/h | Headwind > 15 km/h, Pula → Parecag | Headwind > 15 km/h, Parecag → Pula | Better way |
|---|---|---|---|---|
| January | +0.1 | 6% | 5% | either |
| February | +0.4 | 7% | 7% | either |
| March | +1.2 | 7% | 9% | either |
| April | +1.4 | 3% | 5% | either |
| May | +1.2 | 3% | 4% | either |
| June | +0.8 | 1% | 3% | either |
| July | +0.2 | 2% | 2% | either |
| August | +0.3 | 2% | 2% | either |
| September | +0.6 | 4% | 4% | either |
| October | +0.9 | 5% | 7% | either |
| November | +1.0 | 6% | 7% | either |
| December | +0.1 | 6% | 6% | either |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in September, km/h |
|---|---|---|
| 0–25 | NE | −2.6 |
| 25–50 | N | +0.4 |
| 50–75 | N | −0.4 |
| 75–100 | W | +3.0 |
| 100–126 | NW | +2.1 |
| 126–130 | NW | +1.9 |
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.