Alpe Adria Bicycle Route, stage 4: Udine → Grado
On stage 4 (Udine → Grado, 63 km) the best month is October: 75% 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).
← Alpe Adria Bicycle 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 | 21% | 18% | 93 | 8 °C | 0% | 74% | 9.0 † |
| February | 46% | 22% | 103 | 10 °C | 0% | 44% | 10.3 † |
| March | 68% | 23% | 110 | 14 °C | 0% | 12% | 11.8 |
| April | 73% | 26% | 95 | 18 °C | 0% | 1% | 13.5 |
| May | 62% | 36% | 140 | 22 °C | 2% | 0% | 14.9 |
| June | 47% | 33% | 92 | 27 °C | 22% | 0% | 15.7 |
| July | 35% | 23% | 80 | 29 °C | 48% | 0% | 15.4 |
| August | 35% | 24% | 101 | 29 °C | 45% | 0% | 14.1 |
| September | 70% | 25% | 155 | 24 °C | 6% | 0% | 12.5 |
| October | 75% | 25% | 160 | 19 °C | 0% | 0% | 10.8 † |
| November | 60% | 26% | 168 | 13 °C | 0% | 17% | 9.4 † |
| December | 30% | 18% | 107 | 9 °C | 0% | 63% | 8.7 † |
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 Udine → Grado, km/h | Headwind > 15 km/h, Udine → Grado | Headwind > 15 km/h, Grado → Udine | Better way |
|---|---|---|---|---|
| January | +1.1 | 1% | 0% | either |
| February | 0.0 | 0% | 1% | either |
| March | −1.7 | 1% | 1% | either |
| April | −2.9 | 1% | 0% | Grado → Udine |
| May | −3.1 | 1% | 0% | Grado → Udine |
| June | −3.0 | 1% | 0% | Grado → Udine |
| July | −2.0 | 0% | 0% | Grado → Udine |
| August | −1.4 | 0% | 0% | either |
| September | −0.8 | 0% | 0% | either |
| October | −0.5 | 1% | 0% | either |
| November | +1.3 | 1% | 1% | either |
| December | +2.1 | 1% | 0% | Udine → Grado |
Along the route (sections of about 25 km)
| km | Heading | Tailwind in October, km/h |
|---|---|---|
| 348–374 | S | −0.4 |
| 374–385 | SE | −1.2 |
| 385–411 | S | −0.3 |
Other stages
- Salzburg → Bad Gastein 108 km
- Bad Gastein → Villach 105 km
- Villach → Udine 136 km
- Udine → Grado 63 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.