In December 2020, fuel in Belgium averaged €1.301 for petrol

Petrol, monthly average€1.301/L
Diesel, monthly average€1.323/L
LPG, monthly average€0.514/L
Weekly bulletins held for December 20203

Monthly averages for Belgium across December 2020, from the stored EU Weekly Oil Bulletin monthly history (European Commission, CC BY 4.0).