In January 2019, fuel in Slovenia averaged €1.197 for petrol

Petrol, monthly average€1.197/L
Diesel, monthly average€1.206/L
LPG, monthly average€0.647/L
Weekly bulletins held for January 20194

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