EuroVelo 15 – Rhine Cycle Route, stage 6: Speyer → Mainz
On stage 6 (Speyer → Mainz, 110 km) the best month is September: 80% of days were dry with highs of 10–30 °C; the wind barely favours either direction (0.5 km/h on average; ERA5 2006–2025, 9:00–18:00).
← EuroVelo 15 – Rhine Cycle Route (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 | 8% | 21% | 59 | 5 °C | 0% | 88% | 8.6 † |
| February | 19% | 20% | 47 | 7 °C | 0% | 76% | 10.0 † |
| March | 46% | 21% | 48 | 11 °C | 0% | 45% | 11.7 |
| April | 71% | 20% | 42 | 16 °C | 0% | 15% | 13.7 |
| May | 75% | 24% | 70 | 19 °C | 1% | 2% | 15.3 |
| June | 69% | 23% | 61 | 24 °C | 10% | 0% | 16.3 |
| July | 61% | 23% | 59 | 26 °C | 18% | 0% | 15.9 |
| August | 64% | 21% | 60 | 25 °C | 16% | 0% | 14.4 |
| September | 80% | 18% | 56 | 21 °C | 2% | 0% | 12.5 |
| October | 72% | 20% | 58 | 15 °C | 0% | 12% | 10.7 † |
| November | 29% | 22% | 56 | 9 °C | 0% | 61% | 9.0 † |
| December | 9% | 25% | 66 | 6 °C | 0% | 85% | 8.2 † |
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 Speyer → Mainz, km/h | Headwind > 15 km/h, Speyer → Mainz | Headwind > 15 km/h, Mainz → Speyer | Better way |
|---|---|---|---|---|
| January | +3.0 | 1% | 7% | Speyer → Mainz |
| February | +2.5 | 2% | 7% | Speyer → Mainz |
| March | +0.3 | 2% | 4% | either |
| April | −1.1 | 3% | 2% | either |
| May | −0.9 | 3% | 2% | either |
| June | −0.9 | 3% | 1% | either |
| July | +0.3 | 1% | 1% | either |
| August | +1.2 | 1% | 2% | either |
| September | +0.5 | 1% | 2% | either |
| October | +2.5 | 1% | 4% | Speyer → Mainz |
| November | +3.4 | 1% | 6% | Speyer → Mainz |
| December | +4.0 | 1% | 8% | Speyer → Mainz |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in September, km/h |
|---|---|---|
| 644–669 | N | +0.7 |
| 669–695 | N | +0.3 |
| 695–720 | N | +1.1 |
| 720–745 | N | 0.0 |
| 745–754 | NW | −0.1 |
Other stages
- Andermatt → Buchs 130 km
- Buchs → Konstanz 106 km
- Konstanz → Rheinfelden 133 km
- Rheinfelden → Strasbourg 146 km
- Strasbourg → Speyer 130 km
- Speyer → Mainz 110 km
- Mainz → Neuwied 118 km
- Neuwied → Düsseldorf 137 km
- Düsseldorf → Kleve 124 km
- Kleve → Gorinchem 96 km
- Gorinchem → Hoek van Holland 115 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.