The AA has revealed that between mid-May and mid-June the average cost of petrol rose by 5p.
This is the second highest ever monthly increase, which has seen petrol prices increase from 97.68p in mid-May to its current average of 102.66 a litre.
The 4.98p-a-litre increase comes at a bad time for motorists who may already be struggling with costs such as car insurance after being hit by the recession.
Drivers have had to endure steeper rises in fuel costs just once before with an increase of 5.61p between mid-May and mid-June last year.
The average price of diesel is now 104.85p-a-litre rising by 1.36p-a-litre since mid-May.
The increase means that a family with two petrol cars will now be spending £10.80 more a month than in May, with the UK spending around £3,216,196 a day extra on petrol. It now costs £2.49 more to fill a 50-litre fuel tank than it did it May.
AA president Edmund King said: "At a time of recession, seeing petrol prices rise almost as fast as they did last summer is a bitter pill for UK drivers to swallow - many of whom have lost their jobs, had their pay frozen or have seen savings income collapse with falling interest rates.
© Press Association 2009