D8: Rogaška Slatina-Podčetrtek-Brežice-Novo mesto-Dolenjske Toplice: which way and when to ride
The best month for D8: Rogaška Slatina-Podčetrtek-Brežice-Novo mesto-Dolenjske Toplice is October: 77% of days were dry with highs of 10–30 °C. In October the wind barely favours either direction — on average 0.4 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 | 16% | 16% | 62 | 5 °C | 0% | 82% | 9.0 † |
| February | 31% | 19% | 68 | 7 °C | 0% | 65% | 10.3 † |
| March | 57% | 21% | 68 | 12 °C | 0% | 32% | 11.8 |
| April | 70% | 26% | 73 | 17 °C | 0% | 9% | 13.5 |
| May | 62% | 37% | 116 | 21 °C | 1% | 1% | 14.9 |
| June | 55% | 30% | 98 | 26 °C | 16% | 0% | 15.7 |
| July | 46% | 27% | 93 | 28 °C | 31% | 0% | 15.4 |
| August | 52% | 24% | 97 | 27 °C | 26% | 0% | 14.1 |
| September | 73% | 25% | 117 | 22 °C | 2% | 0% | 12.5 |
| October | 77% | 19% | 88 | 16 °C | 0% | 8% | 10.8 † |
| November | 42% | 21% | 92 | 10 °C | 0% | 49% | 9.4 † |
| December | 13% | 18% | 69 | 5 °C | 0% | 85% | 8.7 † |
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 Rogaška Slatina → Dolenjske Toplice, km/h | Headwind > 15 km/h, Rogaška Slatina → Dolenjske Toplice | Headwind > 15 km/h, Dolenjske Toplice → Rogaška Slatina | Better way |
|---|---|---|---|---|
| January | −0.6 | 2% | 1% | either |
| February | +0.1 | 2% | 2% | either |
| March | +0.3 | 4% | 4% | either |
| April | +0.1 | 3% | 2% | either |
| May | +0.2 | 2% | 2% | either |
| June | 0.0 | 1% | 1% | either |
| July | +0.6 | 1% | 1% | either |
| August | +1.2 | 0% | 0% | either |
| September | +1.2 | 1% | 1% | either |
| October | −0.4 | 2% | 1% | either |
| November | −0.4 | 2% | 1% | either |
| December | −0.4 | 1% | 1% | either |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in October, km/h |
|---|---|---|
| 0–25 | S | −1.6 |
| 25–50 | S | −0.8 |
| 50–76 | W | −0.4 |
| 76–102 | W | +0.6 |
| 102–125 | SW | +0.1 |
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.