EuroVelo 13 - Iron Curtain Trail - part Serbia, stage 4: Zaječar → Pirot
On stage 4 (Zaječar → Pirot, 121 km) the best month is October: 78% of days were dry with highs of 10–30 °C; the wind barely favours either direction (1.2 km/h on average; ERA5 2006–2025, 9:00–18:00).
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Weather by month
| Month | Good days | Rain days ≥ 1 mm | Rain, mm | Avg high | Days ≥ 30 °C | Days < 10 °C | Daylight, h |
|---|---|---|---|---|---|---|---|
| January | 9% | 19% | 57 | 3 °C | 0% | 89% | 9.3 † |
| February | 27% | 18% | 44 | 6 °C | 0% | 71% | 10.4 † |
| March | 47% | 25% | 70 | 11 °C | 0% | 43% | 11.8 |
| April | 68% | 27% | 62 | 16 °C | 0% | 12% | 13.4 |
| May | 64% | 35% | 80 | 20 °C | 1% | 1% | 14.7 |
| June | 52% | 36% | 87 | 25 °C | 13% | 0% | 15.4 |
| July | 48% | 23% | 61 | 28 °C | 32% | 0% | 15.1 |
| August | 52% | 17% | 45 | 28 °C | 32% | 0% | 14.0 |
| September | 76% | 18% | 49 | 23 °C | 6% | 0% | 12.4 |
| October | 78% | 16% | 58 | 16 °C | 0% | 13% | 10.9 † |
| November | 44% | 17% | 61 | 10 °C | 0% | 49% | 9.6 † |
| December | 11% | 18% | 57 | 4 °C | 0% | 87% | 9.0 † |
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 Zaječar → Pirot, km/h | Headwind > 15 km/h, Zaječar → Pirot | Headwind > 15 km/h, Pirot → Zaječar | Better way |
|---|---|---|---|---|
| January | −0.2 | 0% | 2% | either |
| February | +0.6 | 0% | 2% | either |
| March | +1.4 | 1% | 3% | either |
| April | +2.0 | 1% | 3% | Zaječar → Pirot |
| May | +2.1 | 0% | 2% | Zaječar → Pirot |
| June | +2.8 | 0% | 2% | Zaječar → Pirot |
| July | +3.4 | 0% | 2% | Zaječar → Pirot |
| August | +2.5 | 0% | 1% | Zaječar → Pirot |
| September | +1.9 | 0% | 1% | either |
| October | +1.2 | 0% | 1% | either |
| November | −0.3 | 0% | 1% | either |
| December | −0.4 | 0% | 1% | either |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in October, km/h |
|---|---|---|
| 352–377 | SW | +1.5 |
| 377–402 | S | +1.5 |
| 402–427 | SE | +1.1 |
| 427–453 | SE | +1.0 |
| 453–473 | SE | +0.6 |
Other stages
- Moraviţa → Pojejena 96 km
- Pojejena → Eşelniţa 110 km
- Eşelniţa → Zaječar 148 km
- Zaječar → Pirot 121 km
- Pirot → near Dragoman 75 km
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.