EuroVelo 13 - Iron Curtain Trail - part Poland - Pomerania: which way and when to ride
The best month for EuroVelo 13 - Iron Curtain Trail - part Poland - Pomerania is September: 78% of days were dry with highs of 10–30 °C. In September, riding Postomino → near Elbląg meant an average tailwind of 3.2 km/h (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 | 1% | 23% | 58 | 2 °C | 0% | 99% | 7.8 † |
| February | 1% | 19% | 42 | 3 °C | 0% | 99% | 9.6 † |
| March | 14% | 18% | 37 | 6 °C | 0% | 84% | 11.7 |
| April | 43% | 16% | 34 | 10 °C | 0% | 51% | 14.0 |
| May | 71% | 22% | 53 | 15 °C | 0% | 10% | 16.0 |
| June | 75% | 25% | 62 | 19 °C | 1% | 0% | 17.2 |
| July | 69% | 30% | 94 | 21 °C | 1% | 0% | 16.7 |
| August | 70% | 29% | 80 | 21 °C | 1% | 0% | 14.9 |
| September | 78% | 22% | 61 | 18 °C | 0% | 0% | 12.6 |
| October | 61% | 23% | 64 | 12 °C | 0% | 21% | 10.4 † |
| November | 18% | 23% | 60 | 7 °C | 0% | 77% | 8.3 † |
| December | 2% | 23% | 56 | 4 °C | 0% | 98% | 7.3 † |
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 near Elbląg → Postomino, km/h | Headwind > 15 km/h, near Elbląg → Postomino | Headwind > 15 km/h, Postomino → near Elbląg | Better way |
|---|---|---|---|---|
| January | −4.7 | 28% | 13% | Postomino → near Elbląg |
| February | −4.1 | 27% | 13% | Postomino → near Elbląg |
| March | −4.0 | 25% | 11% | Postomino → near Elbląg |
| April | −3.3 | 22% | 12% | Postomino → near Elbląg |
| May | −2.3 | 19% | 11% | Postomino → near Elbląg |
| June | −4.5 | 22% | 7% | Postomino → near Elbląg |
| July | −5.7 | 26% | 6% | Postomino → near Elbląg |
| August | −4.1 | 21% | 6% | Postomino → near Elbląg |
| September | −3.2 | 23% | 11% | Postomino → near Elbląg |
| October | −3.6 | 25% | 12% | Postomino → near Elbląg |
| November | −3.3 | 23% | 12% | Postomino → near Elbląg |
| December | −5.6 | 29% | 10% | Postomino → near Elbląg |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in September, km/h |
|---|---|---|
| 0–25 | NW | −1.8 |
| 25–51 | NW | −2.5 |
| 51–77 | NW | −2.2 |
| 77–102 | N | −0.3 |
| 102–128 | N | −0.6 |
| 128–153 | NW | −2.6 |
| 153–178 | W | −4.5 |
| 178–203 | W | −4.8 |
| 203–229 | SW | −4.6 |
| 229–255 | W | −4.5 |
| 255–280 | SW | −5.1 |
| 280–300 | SW | −5.2 |
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.