Ruta Sava (Srbija): which way and when to ride
The best month for Ruta Sava (Srbija) is October: 83% of days were dry with highs of 10–30 °C. In October the wind barely favours either direction — on average 1.0 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 | 20% | 17% | 48 | 5 °C | 0% | 77% | 9.2 † |
| February | 36% | 19% | 46 | 9 °C | 0% | 57% | 10.4 † |
| March | 62% | 20% | 57 | 14 °C | 0% | 27% | 11.8 |
| April | 75% | 21% | 51 | 19 °C | 2% | 6% | 13.4 |
| May | 66% | 26% | 76 | 23 °C | 8% | 0% | 14.8 |
| June | 39% | 27% | 69 | 28 °C | 38% | 0% | 15.6 |
| July | 31% | 19% | 56 | 31 °C | 56% | 0% | 15.2 |
| August | 30% | 15% | 44 | 31 °C | 58% | 0% | 14.0 |
| September | 66% | 15% | 49 | 25 °C | 20% | 0% | 12.4 |
| October | 83% | 14% | 46 | 19 °C | 0% | 5% | 10.9 † |
| November | 57% | 17% | 51 | 12 °C | 0% | 34% | 9.5 † |
| December | 19% | 16% | 52 | 6 °C | 0% | 77% | 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 Belgrade → Badovinci, km/h | Headwind > 15 km/h, Belgrade → Badovinci | Headwind > 15 km/h, Badovinci → Belgrade | Better way |
|---|---|---|---|---|
| January | −0.2 | 2% | 2% | either |
| February | +0.3 | 3% | 3% | either |
| March | −0.1 | 4% | 4% | either |
| April | −0.3 | 4% | 3% | either |
| May | −0.6 | 3% | 2% | either |
| June | −1.0 | 2% | 1% | either |
| July | −1.0 | 3% | 1% | either |
| August | +0.6 | 1% | 1% | either |
| September | +0.4 | 2% | 1% | either |
| October | +1.0 | 2% | 2% | either |
| November | +1.5 | 2% | 3% | either |
| December | 0.0 | 2% | 2% | either |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in October, km/h |
|---|---|---|
| 0–6 | SW | +1.4 |
| 6–31 | SW | +1.4 |
| 31–56 | SW | +1.4 |
| 56–82 | W | +1.5 |
| 82–108 | NW | +0.2 |
| 108–133 | N | +0.4 |
| 133–158 | SW | +1.2 |
| 158–176 | SW | +1.2 |
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.