There is no definitive answer to this question as the best time to buy a gas grill depends on a number of factors, including personal preferences and budget. However, some experts suggest that late summer or early fall may be the best time to purchase a gas grill, as retailers typically offer discounts on grills during this period. Additionally, the weather is usually more conducive to outdoor cooking during these months, making it the perfect time to break in a new grill. Whatever the case, be sure to do your research before making a purchase so you can find the best deal on the perfect gas grill for your needs.