The agency says the motor vehicle industry was the largest contributor to the gain in August.
In volume terms, wholesale sales were up 0.3 per cent.
In August, five of the seven subsectors reported gains, accounting for about two-thirds of wholesale sales.
The largest increase in dollar terms was in the motor vehicle and parts subsector, with sales rising 3.2 per cent to $8.5 billion, its highest level since June 2012.
Wholesale sales were up in Ontario, British Columbia, and Quebec in August, while the other seven provinces posted declines