Here is a modified version of the recipe with the temperature converted to °C:

Place the patties on the hot grill or griddle and cook for about 3-4 minutes per side for medium-rare, or longer if you prefer your burgers more well-done. If using a grill, use the spatula or tongs to gently press down on the patties to help them cook evenly. If using a griddle, use the meat thermometer to check the internal temperature of the patties: 63°C for medium-rare, 71°C for medium, and 77°C for well-done.

I rounded the numerical temperature values to whole numbers.
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