Pilgerroute, stage 2: Bonn → Duisburg
On stage 2 (Bonn → Duisburg, 121 km) the best month is September: 78% of days were dry with highs of 10–30 °C; the wind barely favours either direction (1.0 km/h on average; ERA5 2006–2025, 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% | 88 | 5 °C | 0% | 86% | 8.4 † |
| February | 15% | 29% | 70 | 7 °C | 0% | 75% | 9.9 † |
| March | 42% | 27% | 67 | 10 °C | 0% | 48% | 11.7 |
| April | 68% | 22% | 48 | 15 °C | 0% | 18% | 13.8 |
| May | 71% | 28% | 74 | 19 °C | 0% | 2% | 15.5 |
| June | 69% | 27% | 73 | 22 °C | 5% | 0% | 16.5 |
| July | 61% | 30% | 88 | 24 °C | 11% | 0% | 16.1 |
| August | 64% | 28% | 86 | 23 °C | 9% | 0% | 14.6 |
| September | 78% | 20% | 65 | 20 °C | 1% | 0% | 12.5 |
| October | 67% | 26% | 80 | 15 °C | 0% | 9% | 10.6 † |
| November | 32% | 30% | 79 | 10 °C | 0% | 54% | 8.8 † |
| December | 10% | 32% | 93 | 6 °C | 0% | 82% | 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 Bonn → Duisburg, km/h | Headwind > 15 km/h, Bonn → Duisburg | Headwind > 15 km/h, Duisburg → Bonn | Better way |
|---|---|---|---|---|
| January | +3.4 | 4% | 13% | Bonn → Duisburg |
| February | +3.4 | 3% | 13% | Bonn → Duisburg |
| March | +0.6 | 5% | 8% | either |
| April | −1.1 | 5% | 5% | either |
| May | −1.5 | 5% | 4% | either |
| June | −1.9 | 4% | 2% | either |
| July | −1.3 | 3% | 2% | either |
| August | +0.3 | 2% | 3% | either |
| September | +1.0 | 3% | 5% | either |
| October | +4.2 | 2% | 14% | Bonn → Duisburg |
| November | +5.2 | 2% | 15% | Bonn → Duisburg |
| December | +4.9 | 2% | 15% | Bonn → Duisburg |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in September, km/h |
|---|---|---|
| 136–161 | NW | −0.6 |
| 161–187 | N | +1.8 |
| 187–212 | NW | +0.9 |
| 212–237 | NW | +0.3 |
| 237–257 | N | +2.9 |
Other stages
- Aachen → Bonn 137 km
- Bonn → Duisburg 121 km
- Duisburg → Lüdinghausen 123 km
- Lüdinghausen → Osnabrück 122 km
- Osnabrück → Goldenstedt 113 km
- Goldenstedt → Zeven 118 km
- Zeven → Wedel 112 km
- Wedel → Rendsburg 130 km
- Rendsburg → Flensburg 96 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.