Radroute Saar-Mosel-Main, stage 4: Mainz → Miltenberg
On stage 4 (Mainz → Miltenberg, 132 km) the best month is September: 78% of days were dry with highs of 10–30 °C; the wind barely favours either direction (1.2 km/h on average; ERA5 2006–2025, 9:00–18:00).
← Radroute Saar-Mosel-Main (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 | 6% | 26% | 74 | 4 °C | 0% | 91% | 8.5 † |
| February | 14% | 24% | 57 | 6 °C | 0% | 81% | 10.0 † |
| March | 40% | 24% | 59 | 10 °C | 0% | 51% | 11.7 |
| April | 67% | 23% | 49 | 15 °C | 0% | 17% | 13.7 |
| May | 71% | 28% | 78 | 19 °C | 0% | 2% | 15.4 |
| June | 69% | 25% | 70 | 23 °C | 7% | 0% | 16.3 |
| July | 60% | 26% | 70 | 25 °C | 15% | 0% | 15.9 |
| August | 65% | 23% | 71 | 24 °C | 13% | 0% | 14.4 |
| September | 78% | 20% | 60 | 20 °C | 2% | 0% | 12.5 |
| October | 68% | 21% | 63 | 14 °C | 0% | 15% | 10.6 † |
| November | 25% | 25% | 64 | 8 °C | 0% | 66% | 8.9 † |
| December | 6% | 28% | 79 | 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 Mainz → Miltenberg, km/h | Headwind > 15 km/h, Mainz → Miltenberg | Headwind > 15 km/h, Miltenberg → Mainz | Better way |
|---|---|---|---|---|
| January | +1.5 | 2% | 10% | either |
| February | +0.6 | 3% | 8% | either |
| March | +1.2 | 3% | 9% | either |
| April | +1.0 | 3% | 6% | either |
| May | +1.7 | 2% | 6% | either |
| June | +2.3 | 1% | 5% | Mainz → Miltenberg |
| July | +3.5 | 0% | 7% | Mainz → Miltenberg |
| August | +2.4 | 0% | 5% | Mainz → Miltenberg |
| September | +1.2 | 1% | 5% | either |
| October | +0.3 | 1% | 6% | either |
| November | +0.3 | 1% | 6% | either |
| December | +0.8 | 2% | 7% | either |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in September, km/h |
|---|---|---|
| 412–437 | E | +2.4 |
| 437–463 | E | +2.5 |
| 463–488 | SE | +1.2 |
| 488–514 | SE | +0.3 |
| 514–540 | S | −0.1 |
| 540–544 | SE | +0.5 |
Other stages
- Sarreguemines → Trier 120 km
- Trier → Cochem 141 km
- Cochem → Mainz 153 km
- Mainz → Miltenberg 132 km
- Miltenberg → Würzburg 132 km
- Würzburg → Haßfurt 121 km
- Haßfurt → Bayreuth 133 km
- Bayreuth → Hohenberg an der Eger 85 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.