EuroVelo 15 - Rheinradweg - Teilstrecke Köln - Moers: which way and when to ride
The best month for EuroVelo 15 - Rheinradweg - Teilstrecke Köln - Moers is September: 78% of days were dry with highs of 10–30 °C. In September the wind barely favours either direction — on average 1.2 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 | 6% | 31% | 87 | 5 °C | 0% | 86% | 8.3 † |
| February | 16% | 28% | 71 | 7 °C | 0% | 75% | 9.9 † |
| March | 42% | 26% | 66 | 11 °C | 0% | 47% | 11.7 |
| April | 68% | 22% | 48 | 15 °C | 0% | 17% | 13.8 |
| May | 71% | 29% | 73 | 19 °C | 0% | 2% | 15.6 |
| June | 70% | 26% | 73 | 22 °C | 5% | 0% | 16.6 |
| July | 61% | 30% | 89 | 24 °C | 10% | 0% | 16.1 |
| August | 64% | 28% | 85 | 23 °C | 9% | 0% | 14.6 |
| September | 78% | 20% | 65 | 20 °C | 2% | 0% | 12.6 |
| October | 66% | 27% | 82 | 15 °C | 0% | 9% | 10.6 † |
| November | 32% | 29% | 78 | 10 °C | 0% | 53% | 8.8 † |
| December | 10% | 31% | 91 | 7 °C | 0% | 81% | 7.9 † |
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 Köln → Teilstrecke Köln - Moers, km/h | Headwind > 15 km/h, Köln → Teilstrecke Köln - Moers | Headwind > 15 km/h, Teilstrecke Köln - Moers → Köln | Better way |
|---|---|---|---|---|
| January | +3.8 | 3% | 13% | Köln → Teilstrecke Köln - Moers |
| February | +3.7 | 3% | 14% | Köln → Teilstrecke Köln - Moers |
| March | +0.8 | 5% | 8% | either |
| April | −1.0 | 5% | 5% | either |
| May | −1.4 | 5% | 3% | either |
| June | −1.6 | 3% | 2% | either |
| July | −1.0 | 3% | 2% | either |
| August | +0.6 | 2% | 3% | either |
| September | +1.2 | 2% | 5% | either |
| October | +4.4 | 2% | 14% | Köln → Teilstrecke Köln - Moers |
| November | +5.5 | 2% | 16% | Köln → Teilstrecke Köln - Moers |
| December | +5.3 | 2% | 16% | Köln → Teilstrecke Köln - Moers |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in September, km/h |
|---|---|---|
| 0–25 | N | +1.0 |
| 25–50 | NW | −0.1 |
| 50–76 | N | +1.8 |
| 76–101 | N | +2.1 |
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.