EuroVelo 7 - Sun Route - part Italy 1, stage 1: Sillian → Bolzano
On stage 1 (Sillian → Bolzano, 124 km) the best month is September: 65% of days were dry with highs of 10–30 °C; the wind barely favours either direction (0.7 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 | 0% | 17% | 53 | -1 °C | 0% | 100% | 8.9 † |
| February | 3% | 19% | 53 | 1 °C | 0% | 97% | 10.2 † |
| March | 11% | 21% | 66 | 5 °C | 0% | 88% | 11.8 |
| April | 30% | 31% | 78 | 9 °C | 0% | 63% | 13.5 |
| May | 39% | 51% | 124 | 13 °C | 0% | 30% | 15.0 |
| June | 47% | 51% | 117 | 18 °C | 0% | 4% | 15.8 |
| July | 51% | 49% | 114 | 20 °C | 0% | 0% | 15.5 |
| August | 56% | 44% | 123 | 19 °C | 0% | 1% | 14.2 |
| September | 65% | 29% | 91 | 15 °C | 0% | 12% | 12.5 |
| October | 51% | 22% | 94 | 11 °C | 0% | 42% | 10.8 † |
| November | 11% | 23% | 95 | 5 °C | 0% | 89% | 9.3 † |
| December | 0% | 17% | 68 | 0 °C | 0% | 100% | 8.6 † |
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 Sillian → Bolzano, km/h | Headwind > 15 km/h, Sillian → Bolzano | Headwind > 15 km/h, Bolzano → Sillian | Better way |
|---|---|---|---|---|
| January | +0.8 | 0% | 0% | either |
| February | +0.2 | 0% | 0% | either |
| March | −0.3 | 0% | 0% | either |
| April | −0.4 | 0% | 0% | either |
| May | −0.6 | 0% | 0% | either |
| June | −1.0 | 0% | 0% | either |
| July | −1.3 | 0% | 0% | either |
| August | −1.1 | 0% | 0% | either |
| September | −0.7 | 0% | 0% | either |
| October | −0.4 | 0% | 0% | either |
| November | +0.5 | 0% | 0% | either |
| December | +1.1 | 0% | 0% | either |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in September, km/h |
|---|---|---|
| 0–25 | W | +0.2 |
| 25–51 | W | −0.5 |
| 51–76 | W | −0.8 |
| 76–101 | SW | −0.9 |
| 101–124 | SW | −1.3 |
Other stages
- Sillian → Bolzano 124 km
- Bolzano → Ala 110 km
- Ala → Mantua 101 km
- Mantua → Bologna 127 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.