The July 2013 also witnessed the best growth in total retail sales in the country since April 2011.
In real terms, total sales increased by 4.4%, upon taking 0.5% shop price deflation into account.
Like-for-like sales during the month rose by 1.4%, as against 2.2% decline in July 2012.
SRC director Fiona Moriarty said that two feel-good factors have driven the Scottish sales growth into record-breaking territory in July.
"Sunshine and sporting successes boosted the public mood and willingness to spend further after a promising pick-up in June," added Moriarty.
The 3-month average accelerated to 2.5% versus 0.8% average for 12-month period.
During the month, total food sales grew 5.6%, compared to 0.1% increase during the July 2012.
Total non-food sales recorded an increase of 2.6%, against a 1.5% drop in the same month of previous year.
"Summer food, seasonal fashions and outdoor living products were stand-out performers in what was an impressive month. In the second warmest July on record, demand for picnic and barbeque fare drove a strong performance for food, while non-food leapt up to its best result since December 2009," noted Moriarty.
"By way of contrast, it was a disappointing month for furniture and other homewares, as appetite for ‘indoor living’ was diminished and many people prioritised putting their money towards updating their summer wardrobes, taking advantage of the good deals on offer, and enjoying the sunshine.
"It’s too early to tell whether what we’re seeing is a welcome but short-lived uplift or the beginnings of longer-lasting economic recovery. But this run of good growth, bringing the three month average to 2.5 per cent, means things are certainly looking up for the time being."