In September 2018, fuel in Czechia averaged €1.299 for petrol

Petrol, monthly average€1.299/L
Diesel, monthly average€1.270/L
LPG, monthly average€0.601/L
Weekly bulletins held for September 20184

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