EuroVelo 4 - Central Europe Route - part Germany, stage 3: Koblenz → Frankfurt am Main
On stage 3 (Koblenz → Frankfurt am Main, 133 km) the best month is September: 80% of days were dry with highs of 10–30 °C; the wind barely favours either direction (1.3 km/h on average; ERA5 2006–2025, 9:00–18:00).
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Weather by month
| Month | Good days | Rain days ≥ 1 mm | Rain, mm | Avg high | Days ≥ 30 °C | Days < 10 °C | Daylight, h |
|---|---|---|---|---|---|---|---|
| January | 5% | 23% | 59 | 4 °C | 0% | 92% | 8.5 † |
| February | 14% | 20% | 46 | 6 °C | 0% | 83% | 10.0 † |
| March | 38% | 24% | 50 | 10 °C | 0% | 53% | 11.7 |
| April | 67% | 22% | 44 | 15 °C | 0% | 20% | 13.7 |
| May | 72% | 27% | 69 | 18 °C | 0% | 2% | 15.4 |
| June | 69% | 26% | 68 | 23 °C | 6% | 0% | 16.4 |
| July | 64% | 25% | 63 | 24 °C | 13% | 0% | 16.0 |
| August | 67% | 24% | 66 | 24 °C | 10% | 0% | 14.5 |
| September | 80% | 18% | 56 | 20 °C | 1% | 0% | 12.5 |
| October | 67% | 21% | 58 | 14 °C | 0% | 15% | 10.6 † |
| November | 23% | 23% | 55 | 8 °C | 0% | 68% | 8.9 † |
| December | 6% | 25% | 65 | 5 °C | 0% | 89% | 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 Koblenz → Frankfurt am Main, km/h | Headwind > 15 km/h, Koblenz → Frankfurt am Main | Headwind > 15 km/h, Frankfurt am Main → Koblenz | Better way |
|---|---|---|---|---|
| January | +2.5 | 2% | 12% | Koblenz → Frankfurt am Main |
| February | +1.2 | 4% | 10% | either |
| March | +1.5 | 4% | 11% | either |
| April | +0.7 | 3% | 7% | either |
| May | +1.5 | 2% | 8% | either |
| June | +2.2 | 1% | 7% | Koblenz → Frankfurt am Main |
| July | +3.6 | 1% | 9% | Koblenz → Frankfurt am Main |
| August | +2.6 | 1% | 6% | Koblenz → Frankfurt am Main |
| September | +1.3 | 2% | 6% | either |
| October | +0.6 | 2% | 7% | either |
| November | +1.0 | 2% | 8% | either |
| December | +1.9 | 3% | 9% | either |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in September, km/h |
|---|---|---|
| 212–237 | S | −0.7 |
| 237–263 | SE | +0.4 |
| 263–288 | E | +2.0 |
| 288–314 | E | +2.1 |
| 314–340 | NE | +2.4 |
| 340–345 | E | +2.3 |
Other stages
- Venlo → Köln 104 km
- Köln → Koblenz 109 km
- Koblenz → Frankfurt am Main 133 km
- Frankfurt am Main → Wertheim 126 km
- Wertheim → Würzburg 104 km
- Würzburg → Haßfurt 114 km
- Haßfurt → Kulmbach 112 km
- Kulmbach → Hohenberg an der Eger 107 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.