watermelon sugar content byMaurice Knox •Agustus 25, 2022 Watermelon 1 g contain s 60 milligram s of sugar 10 milligram s of protein 0 grams of fat 10 milligram s of fiber and 60 milligram s of carbohydrate. 3 It also has a fairly high glycemic index GI of 80 on a scale of 1 to 100. …