BiH Bihac - Bos.Gradiska: which way and when to ride
The best month for BiH Bihac - Bos.Gradiska is October: 78% of days were dry with highs of 10–30 °C. In October the wind barely favours either direction — on average 1.2 km/h along the route (ERA5 2006–2025, daytime 9:00–18:00).
Also passes through Croatia
Weather by month
| Month | Good days | Rain days ≥ 1 mm | Rain, mm | Avg high | Days ≥ 30 °C | Days < 10 °C | Daylight, h |
|---|---|---|---|---|---|---|---|
| January | 20% | 20% | 76 | 6 °C | 0% | 77% | 9.1 † |
| February | 35% | 23% | 73 | 8 °C | 0% | 58% | 10.3 † |
| March | 56% | 25% | 82 | 13 °C | 0% | 32% | 11.8 |
| April | 67% | 28% | 79 | 18 °C | 0% | 9% | 13.4 |
| May | 62% | 36% | 120 | 21 °C | 3% | 1% | 14.8 |
| June | 49% | 30% | 85 | 26 °C | 23% | 0% | 15.6 |
| July | 40% | 24% | 78 | 29 °C | 40% | 0% | 15.3 |
| August | 45% | 20% | 77 | 28 °C | 37% | 0% | 14.1 |
| September | 69% | 24% | 107 | 23 °C | 7% | 0% | 12.4 |
| October | 78% | 19% | 88 | 18 °C | 0% | 6% | 10.9 † |
| November | 49% | 22% | 95 | 11 °C | 0% | 41% | 9.5 † |
| December | 19% | 20% | 81 | 7 °C | 0% | 75% | 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 Bosanska Gradiska → near Bosanska Krupa, km/h | Headwind > 15 km/h, Bosanska Gradiska → near Bosanska Krupa | Headwind > 15 km/h, near Bosanska Krupa → Bosanska Gradiska | Better way |
|---|---|---|---|---|
| January | +0.3 | 1% | 1% | either |
| February | +0.7 | 2% | 1% | either |
| March | +0.9 | 4% | 3% | either |
| April | +0.9 | 2% | 1% | either |
| May | +0.6 | 1% | 1% | either |
| June | +0.8 | 1% | 0% | either |
| July | +1.9 | 1% | 0% | either |
| August | +2.9 | 0% | 0% | Bosanska Gradiska → near Bosanska Krupa |
| September | +2.1 | 1% | 0% | Bosanska Gradiska → near Bosanska Krupa |
| October | +1.2 | 1% | 1% | either |
| November | +0.7 | 1% | 0% | either |
| December | +0.4 | 1% | 1% | either |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in October, km/h |
|---|---|---|
| 0–25 | W | +1.1 |
| 25–51 | W | +1.2 |
| 51–77 | W | +1.2 |
| 77–102 | SW | +1.5 |
| 102–127 | SW | +1.2 |
| 127–154 | W | +1.1 |
| 154–162 | SW | +1.1 |
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.