Tailwind Atlas

EuroVelo 6 - Atlantic-Black Sea - part France, stage 6: Cosne-Cours-sur-Loire → Decize

On stage 6 (Cosne-Cours-sur-Loire → Decize, 114 km) the best month is September: 75% of days were dry with highs of 10–30 °C; the wind barely favours either direction (1.1 km/h on average; ERA5 2006–2025, 9:00–18:00).

ERA5 2006–2025 · OpenStreetMap · Methodology and sources

← EuroVelo 6 - Atlantic-Black Sea - part France (Whole route)

114 kmLength
September–October (peak September)Best months
eitherBetter direction in the best month
1.1 km/hAverage tailwind in the best month
75%Dry days with 10–30 °C
June · 67%Best summer month
Start: Cosne-Cours-sur-Loire · Finish: Decize · Route geometry: OpenStreetMap / Waymarked Trails

Weather by month

MonthGood daysRain days ≥ 1 mmRain, mmAvg highDays ≥ 30 °CDays < 10 °CDaylight, h
January16%25%767 °C0%74%8.9 †
February31%27%609 °C0%57%10.2 †
March54%29%7513 °C0%26%11.8
April71%25%6117 °C0%6%13.5
May69%30%8220 °C1%1%15.0
June67%22%6824 °C12%0%15.9
July64%18%5626 °C20%0%15.5
August65%17%5826 °C20%0%14.2
September75%19%6422 °C6%0%12.5
October74%23%8317 °C0%3%10.8 †
November43%28%7811 °C0%38%9.3 †
December19%27%888 °C0%67%8.5 †

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 Cosne-Cours-sur-Loire → Decize, km/hHeadwind > 15 km/h, Cosne-Cours-sur-Loire → DecizeHeadwind > 15 km/h, Decize → Cosne-Cours-sur-LoireBetter way
January−0.25%5%either
February0.05%6%either
March+1.14%7%either
April+1.34%5%either
May+2.52%6%Cosne-Cours-sur-Loire → Decize
June+2.31%3%Cosne-Cours-sur-Loire → Decize
July+2.71%3%Cosne-Cours-sur-Loire → Decize
August+2.30%2%Cosne-Cours-sur-Loire → Decize
September+1.12%3%either
October−1.55%2%either
November−1.66%4%either
December−1.25%5%either

Along the route (sections of about 25 km)

kmHeadingTailwind in September, km/h
562–587S+0.5
587–612S+0.6
612–638SE+1.6
638–664SE+1.5
664–676E+1.2

Other stages

  1. Saint-Brevin-les-Pins → Saint-Florent-le-Vieil 118 km
  2. Saint-Florent-le-Vieil → Saumur 109 km
  3. Saumur → Amboise 112 km
  4. Amboise → Orléans 104 km
  5. Orléans → Cosne-Cours-sur-Loire 122 km
  6. Cosne-Cours-sur-Loire → Decize 114 km
  7. Decize → Montceau-les-Mines 130 km
  8. Montceau-les-Mines → Seurre 112 km
  9. Seurre → Besançon 102 km
  10. Besançon → Basel 185 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.