Tailwind Atlas

Appennino Bike Tour, stage 26: Gaggi → Alia

On stage 26 (Gaggi → Alia, 164 km) the best month is May: 84% of days were dry with highs of 10–30 °C; the wind barely favours either direction (0.1 km/h on average; ERA5 2006–2025, 9:00–18:00).

ERA5 2006–2025 · OpenStreetMap · Methodology and sources

← Appennino Bike Tour (Whole route)

164 kmLength
MayBest months
eitherBetter direction in the best month
0.1 km/hAverage tailwind in the best month
84%Dry days with 10–30 °C
June · 81%Best summer month
Start: Gaggi · Finish: Alia · Route geometry: OpenStreetMap / Waymarked Trails

Weather by month

MonthGood daysRain days ≥ 1 mmRain, mmAvg highDays ≥ 30 °CDays < 10 °CDaylight, h
January63%31%9912 °C0%15%9.8 †
February60%32%9812 °C0%16%10.7 †
March66%33%10214 °C0%5%11.8
April76%23%6417 °C0%0%13.1
May84%16%4520 °C0%0%14.2
June81%11%2625 °C8%0%14.8
July76%5%928 °C20%0%14.6
August71%11%2428 °C18%0%13.6
September67%30%9225 °C3%0%12.4
October67%33%14021 °C0%0%11.1
November65%35%11017 °C0%0%10.1 †
December68%30%9014 °C0%5%9.5 †

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 Gaggi → Alia, km/hHeadwind > 15 km/h, Gaggi → AliaHeadwind > 15 km/h, Alia → GaggiBetter way
January+0.43%4%either
February0.04%4%either
March+0.52%4%either
April+0.52%3%either
May−0.11%2%either
June−0.90%2%either
July−1.30%2%either
August−1.10%2%either
September−0.11%2%either
October+0.31%2%either
November+1.31%3%either
December+0.43%3%either

Along the route (sections of about 25 km)

kmHeadingTailwind in May, km/h
3,017–3,042NE−1.1
3,042–3,067NW−1.1
3,067–3,093N−1.2
3,093–3,118E+0.2
3,118–3,143NE−0.6
3,143–3,168NE−0.5
3,168–3,181E+6.7

Other stages

  1. Bocchetta di Altare → Ronco Scrivia 118 km
  2. Ronco Scrivia → Farini 118 km
  3. Farini → Monchio delle Corti 118 km
  4. Monchio delle Corti → Pievepelago 118 km
  5. Pievepelago → Castiglione dei Pepoli 124 km
  6. Castiglione dei Pepoli → Bibbiena 114 km
  7. Bibbiena → Gubbio 120 km
  8. Gubbio → Spoleto 100 km
  9. Spoleto → Arquata del Tronto 118 km
  10. Arquata del Tronto → Paganica-Tempera 144 km
  11. Paganica-Tempera → Castel di Sangro 152 km
  12. Castel di Sangro → Guardiaregia 118 km
  13. Guardiaregia → Sant'Angelo dei Lombardi 116 km
  14. Sant'Angelo dei Lombardi → Pignola 112 km
  15. Pignola → San Brancato 136 km
  16. San Brancato → Mormanno 110 km
  17. Mormanno → San Marco Argentano 118 km
  18. San Marco Argentano → Spezzano della Sila 114 km
  19. Spezzano della Sila → Borgia 118 km
  20. Borgia → Fabrizia 110 km
  21. Fabrizia → Villa San Giovanni 121 km
  22. Villa San Giovanni → Alia 2 km
  23. Alia → Gangi 99 km
  24. Gangi → Bronte 108 km
  25. Bronte → Gaggi 110 km
  26. Gaggi → Alia 164 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.