Tailwind Atlas

Route of Brave Soldier Shwejk: which way and when to ride

The best month for Route of Brave Soldier Shwejk is September: 75% of days were dry with highs of 10–30 °C. In September the wind barely favours either direction — on average 1.1 km/h along the route (ERA5 2006–2025, daytime 9:00–18:00).

ERA5 2006–2025 · OpenStreetMap · Methodology and sources

228 kmLength
SeptemberBest months
eitherBetter direction in the best month
1.1 km/hAverage tailwind in the best month
75%Dry days with 10–30 °C
August · 64%Best summer month
Start: Lviv · Finish: near Ustrzyki Dolne · Route geometry: OpenStreetMap / Waymarked Trails

Weather by month

MonthGood daysRain days ≥ 1 mmRain, mmAvg highDays ≥ 30 °CDays < 10 °CDaylight, h
January2%23%511 °C0%98%8.6 †
February6%22%503 °C0%93%10.0 †
March30%26%578 °C0%64%11.7
April59%29%5814 °C0%22%13.7
May61%38%9419 °C0%3%15.3
June61%36%9323 °C3%0%16.3
July55%38%11424 °C9%0%15.9
August64%27%7725 °C10%0%14.4
September75%24%8219 °C1%2%12.5
October65%20%5914 °C0%23%10.7 †
November30%21%508 °C0%66%9.0 †
December4%23%553 °C0%96%8.2 †

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 Lviv → near Ustrzyki Dolne, km/hHeadwind > 15 km/h, Lviv → near Ustrzyki DolneHeadwind > 15 km/h, near Ustrzyki Dolne → LvivBetter way
January−3.819%5%near Ustrzyki Dolne → Lviv
February−2.616%5%near Ustrzyki Dolne → Lviv
March−2.416%6%near Ustrzyki Dolne → Lviv
April−1.311%6%either
May−0.37%4%either
June−0.77%3%either
July−2.07%3%near Ustrzyki Dolne → Lviv
August−1.05%2%either
September−1.18%4%either
October−2.513%5%near Ustrzyki Dolne → Lviv
November−2.713%4%near Ustrzyki Dolne → Lviv
December−4.119%4%near Ustrzyki Dolne → Lviv

Along the route (sections of about 25 km)

kmHeadingTailwind in September, km/h
0–25SW−1.1
25–50W−2.1
50–75SW−1.8
75–101W−1.8
101–126NW−1.8
126–152N−0.7
152–178SW−0.6
178–203SE+1.9
203–228W−2.0

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