9 - Jižní stezka: which way and when to ride
The best month for 9 - Jižní stezka is September: 78% of days were dry with highs of 10–30 °C. In September the wind barely favours either direction — on average 1.6 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% | 22% | 50 | 1 °C | 0% | 98% | 8.6 † |
| February | 6% | 18% | 37 | 3 °C | 0% | 93% | 10.0 † |
| March | 30% | 22% | 44 | 8 °C | 0% | 66% | 11.7 |
| April | 60% | 25% | 46 | 13 °C | 0% | 29% | 13.7 |
| May | 64% | 33% | 75 | 17 °C | 0% | 6% | 15.4 |
| June | 68% | 29% | 73 | 22 °C | 3% | 0% | 16.3 |
| July | 63% | 30% | 79 | 23 °C | 7% | 0% | 15.9 |
| August | 66% | 27% | 80 | 23 °C | 7% | 0% | 14.4 |
| September | 78% | 21% | 59 | 18 °C | 0% | 2% | 12.5 |
| October | 58% | 20% | 47 | 12 °C | 0% | 30% | 10.6 † |
| November | 15% | 19% | 46 | 6 °C | 0% | 82% | 9.0 † |
| December | 2% | 19% | 49 | 3 °C | 0% | 98% | 8.1 † |
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 Kynšperk nad Ohří → Mladý Smolivec, km/h | Headwind > 15 km/h, Kynšperk nad Ohří → Mladý Smolivec | Headwind > 15 km/h, Mladý Smolivec → Kynšperk nad Ohří | Better way |
|---|---|---|---|---|
| January | +3.3 | 1% | 13% | Kynšperk nad Ohří → Mladý Smolivec |
| February | +2.5 | 2% | 12% | Kynšperk nad Ohří → Mladý Smolivec |
| March | +2.4 | 4% | 12% | Kynšperk nad Ohří → Mladý Smolivec |
| April | +1.6 | 3% | 8% | either |
| May | +1.4 | 4% | 8% | either |
| June | +2.5 | 1% | 7% | Kynšperk nad Ohří → Mladý Smolivec |
| July | +4.1 | 0% | 9% | Kynšperk nad Ohří → Mladý Smolivec |
| August | +2.3 | 0% | 5% | Kynšperk nad Ohří → Mladý Smolivec |
| September | +1.6 | 2% | 6% | either |
| October | +1.5 | 1% | 8% | either |
| November | +1.7 | 1% | 9% | either |
| December | +2.8 | 1% | 10% | Kynšperk nad Ohří → Mladý Smolivec |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in September, km/h |
|---|---|---|
| 0–25 | SE | +1.0 |
| 25–51 | S | +0.5 |
| 51–76 | SE | +1.8 |
| 76–101 | E | +2.1 |
| 101–127 | E | +2.3 |
| 127–152 | SE | +1.0 |
| 152–172 | SE | +2.3 |
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.