Tailwind Atlas

EuroVelo 7 - Sun Route - part Italy 1: which way and when to ride

The best month for EuroVelo 7 - Sun Route - part Italy 1 is October: 71% of days were dry with highs of 10–30 °C. In October the wind barely favours either direction — on average 0.5 km/h along the route (ERA5 2006–2025, daytime 9:00–18:00).

ERA5 2006–2025 · OpenStreetMap · Methodology and sources

462 kmLength
September–October (peak October)Best months
eitherBetter direction in the best month
0.5 km/hAverage tailwind in the best month
71%Dry days with 10–30 °C
June · 49%Best summer month
Start: Sillian · Finish: Bologna · Route geometry: OpenStreetMap / Waymarked Trails

Weather by month

MonthGood daysRain days ≥ 1 mmRain, mmAvg highDays ≥ 30 °CDays < 10 °CDaylight, h
January10%15%554 °C0%89%9.0 †
February29%19%677 °C0%69%10.3 †
March48%21%7310 °C0%45%11.8
April57%29%8515 °C0%24%13.5
May57%39%12218 °C2%9%14.9
June49%35%9824 °C16%1%15.7
July43%31%9226 °C29%0%15.4
August46%31%10225 °C26%0%14.1
September69%24%9421 °C5%3%12.5
October71%20%9716 °C0%14%10.8 †
November43%21%10410 °C0%49%9.4 †
December12%15%685 °C0%86%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

MonthWind Sillian → Bologna, km/hHeadwind > 15 km/h, Sillian → BolognaHeadwind > 15 km/h, Bologna → SillianBetter way
January+1.00%0%either
February+0.20%0%either
March−0.50%0%either
April−1.10%0%either
May−1.20%0%either
June−1.50%0%either
July−1.40%0%either
August−1.20%0%either
September−0.90%0%either
October−0.50%0%either
November+0.60%0%either
December+1.10%0%either

Stages

The route is split into 4 stages of about 100–150 km between towns; each stage has its own page.

StagekmBest monthTailwind Sillian → Bologna in October, km/h
1. Sillian → Bolzano124September−0.4
2. Bolzano → Ala110September−1.3
3. Ala → Mantua101October−0.7
4. Mantua → Bologna127October+0.3

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.

OpenStreetMap · Waymarked Trails