In June 2019, fuel in Slovenia averaged €1.313 for petrol

Petrol, monthly average€1.313/L
Diesel, monthly average€1.243/L
LPG, monthly average€0.623/L
Weekly bulletins held for June 20194

Monthly averages for Slovenia across June 2019, from the stored EU Weekly Oil Bulletin monthly history (European Commission, CC BY 4.0).