Mittelland-Route (Aachen – Zittau), stage 4: Stadtallendorf → Heringen
On stage 4 (Stadtallendorf → Heringen, 116 km) the best month is September: 78% of days were dry with highs of 10–30 °C, and riding Stadtallendorf → Heringen meant an average tailwind of 3.1 km/h (ERA5 2006–2025, 9:00–18:00).
← Mittelland-Route (Aachen – Zittau) (Whole route)
Weather by month
| Month | Good days | Rain days ≥ 1 mm | Rain, mm | Avg high | Days ≥ 30 °C | Days < 10 °C | Daylight, h |
|---|---|---|---|---|---|---|---|
| January | 3% | 24% | 69 | 3 °C | 0% | 95% | 8.4 † |
| February | 8% | 25% | 55 | 5 °C | 0% | 89% | 9.9 † |
| March | 31% | 27% | 55 | 9 °C | 0% | 62% | 11.7 |
| April | 61% | 25% | 50 | 14 °C | 0% | 26% | 13.8 |
| May | 67% | 31% | 75 | 17 °C | 0% | 5% | 15.5 |
| June | 70% | 27% | 69 | 21 °C | 3% | 0% | 16.5 |
| July | 65% | 27% | 74 | 23 °C | 9% | 0% | 16.1 |
| August | 69% | 26% | 75 | 23 °C | 6% | 0% | 14.5 |
| September | 78% | 21% | 58 | 19 °C | 0% | 1% | 12.5 |
| October | 61% | 22% | 60 | 13 °C | 0% | 23% | 10.6 † |
| November | 20% | 24% | 57 | 7 °C | 0% | 74% | 8.8 † |
| December | 4% | 28% | 68 | 4 °C | 0% | 94% | 8.0 † |
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 Stadtallendorf → Heringen, km/h | Headwind > 15 km/h, Stadtallendorf → Heringen | Headwind > 15 km/h, Heringen → Stadtallendorf | Better way |
|---|---|---|---|---|
| January | +5.2 | 1% | 18% | Stadtallendorf → Heringen |
| February | +3.6 | 4% | 15% | Stadtallendorf → Heringen |
| March | +2.9 | 5% | 15% | Stadtallendorf → Heringen |
| April | +1.2 | 6% | 9% | either |
| May | +1.8 | 4% | 10% | either |
| June | +3.1 | 2% | 9% | Stadtallendorf → Heringen |
| July | +5.6 | 0% | 12% | Stadtallendorf → Heringen |
| August | +4.8 | 0% | 9% | Stadtallendorf → Heringen |
| September | +3.1 | 2% | 9% | Stadtallendorf → Heringen |
| October | +3.6 | 1% | 11% | Stadtallendorf → Heringen |
| November | +4.2 | 1% | 12% | Stadtallendorf → Heringen |
| December | +5.1 | 1% | 15% | Stadtallendorf → Heringen |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in September, km/h |
|---|---|---|
| 376–401 | NE | +3.9 |
| 401–426 | E | +2.2 |
| 426–452 | E | +3.1 |
| 452–477 | E | +3.0 |
| 477–492 | NE | +3.5 |
Other stages
- Aachen → Bonn 137 km
- Bonn → Siegen 131 km
- Siegen → Stadtallendorf 110 km
- Stadtallendorf → Heringen 116 km
- Heringen → Erfurt 118 km
- Erfurt → Gera 115 km
- Gera → Freiberg 124 km
- Freiberg → Neustadt in Sachsen 115 km
- Neustadt in Sachsen → Zittau 72 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.