In August 2015, fuel in Latvia averaged €1.122 for petrol

Petrol, monthly average€1.122/L
Diesel, monthly average€1.020/L
LPG, monthly average€0.543/L
Weekly bulletins held for August 20155

Monthly averages for Latvia across August 2015, from the stored EU Weekly Oil Bulletin monthly history (European Commission, CC BY 4.0).