In August 2018, fuel in Czechia averaged €1.284 for petrol

Petrol, monthly average€1.284/L
Diesel, monthly average€1.252/L
LPG, monthly average€0.582/L
Weekly bulletins held for August 20184

Monthly averages for Czechia across August 2018, from the stored EU Weekly Oil Bulletin monthly history (European Commission, CC BY 4.0).