Green Velo - 09 Roztocze: which way and when to ride
The best month for Green Velo - 09 Roztocze is September: 76% of days were dry with highs of 10–30 °C. In September the wind barely favours either direction — on average 0.3 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 | 1% | 21% | 51 | 1 °C | 0% | 98% | 8.5 † |
| February | 5% | 19% | 41 | 3 °C | 0% | 94% | 10.0 † |
| March | 31% | 22% | 49 | 8 °C | 0% | 64% | 11.7 |
| April | 63% | 24% | 48 | 14 °C | 0% | 23% | 13.7 |
| May | 66% | 33% | 81 | 19 °C | 0% | 2% | 15.4 |
| June | 66% | 30% | 82 | 23 °C | 5% | 0% | 16.4 |
| July | 58% | 32% | 102 | 25 °C | 12% | 0% | 16.0 |
| August | 64% | 25% | 72 | 25 °C | 12% | 0% | 14.5 |
| September | 76% | 23% | 74 | 20 °C | 1% | 2% | 12.5 |
| October | 65% | 18% | 52 | 14 °C | 0% | 24% | 10.6 † |
| November | 27% | 19% | 47 | 7 °C | 0% | 68% | 8.9 † |
| December | 3% | 20% | 49 | 3 °C | 0% | 97% | 8.0 † |
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 Krasnystaw → near Stubno, km/h | Headwind > 15 km/h, near Krasnystaw → near Stubno | Headwind > 15 km/h, near Stubno → near Krasnystaw | Better way |
|---|---|---|---|---|
| January | −3.1 | 14% | 5% | near Stubno → near Krasnystaw |
| February | −2.1 | 11% | 6% | near Stubno → near Krasnystaw |
| March | −0.5 | 10% | 8% | either |
| April | +0.7 | 7% | 8% | either |
| May | +1.0 | 4% | 7% | either |
| June | +1.3 | 4% | 6% | either |
| July | +0.7 | 3% | 4% | either |
| August | −0.5 | 3% | 2% | either |
| September | −0.3 | 5% | 5% | either |
| October | −2.7 | 10% | 4% | near Stubno → near Krasnystaw |
| November | −4.0 | 11% | 3% | near Stubno → near Krasnystaw |
| December | −3.7 | 14% | 4% | near Stubno → near Krasnystaw |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in September, km/h |
|---|---|---|
| 0–25 | SW | −0.7 |
| 25–50 | S | −0.1 |
| 50–75 | SE | +0.6 |
| 75–102 | SE | +1.6 |
| 102–128 | S | −0.1 |
| 128–153 | S | −0.7 |
| 153–178 | SW | −1.5 |
| 178–201 | SW | −1.4 |
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.