Green Velo - 08 Polesie: which way and when to ride
The best month for Green Velo - 08 Polesie is September: 77% 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 | 1% | 21% | 48 | 0 °C | 0% | 99% | 8.3 † |
| February | 4% | 17% | 35 | 2 °C | 0% | 95% | 9.9 † |
| March | 29% | 20% | 45 | 7 °C | 0% | 67% | 11.7 |
| April | 63% | 21% | 46 | 14 °C | 0% | 24% | 13.8 |
| May | 69% | 30% | 74 | 19 °C | 0% | 2% | 15.6 |
| June | 69% | 27% | 77 | 23 °C | 5% | 0% | 16.6 |
| July | 60% | 29% | 91 | 25 °C | 13% | 0% | 16.1 |
| August | 65% | 22% | 73 | 25 °C | 14% | 0% | 14.6 |
| September | 77% | 21% | 67 | 19 °C | 1% | 2% | 12.6 |
| October | 64% | 16% | 49 | 13 °C | 0% | 27% | 10.6 † |
| November | 22% | 17% | 40 | 7 °C | 0% | 73% | 8.8 † |
| December | 2% | 19% | 44 | 2 °C | 0% | 97% | 7.9 † |
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 Sławatycze → near Krasnystaw, km/h | Headwind > 15 km/h, Sławatycze → near Krasnystaw | Headwind > 15 km/h, near Krasnystaw → Sławatycze | Better way |
|---|---|---|---|---|
| January | −4.1 | 15% | 4% | near Krasnystaw → Sławatycze |
| February | −2.8 | 12% | 4% | near Krasnystaw → Sławatycze |
| March | −1.1 | 11% | 7% | either |
| April | +0.4 | 7% | 8% | either |
| May | +1.2 | 5% | 7% | either |
| June | +1.1 | 4% | 6% | either |
| July | +0.1 | 4% | 4% | either |
| August | −1.2 | 4% | 2% | either |
| September | −0.6 | 6% | 4% | either |
| October | −3.4 | 11% | 3% | near Krasnystaw → Sławatycze |
| November | −4.9 | 13% | 2% | near Krasnystaw → Sławatycze |
| December | −4.8 | 17% | 3% | near Krasnystaw → Sławatycze |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in September, km/h |
|---|---|---|
| 0–27 | S | −0.3 |
| 27–52 | SE | +0.8 |
| 52–77 | SW | −0.7 |
| 77–103 | SW | −0.9 |
| 103–128 | SW | −1.1 |
| 128–151 | SW | −1.5 |
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.