There is no harm in weaning in summer, but compared to weaning in spring and fall, it is easy to cause illness, malnutrition and indigestion in babies. The relative appropriate seasons for weaning are spring and fall, when the temperature is relatively calm and it is easy to induce increased complementary food intake to supplement nutrition. If you choose to wean in summer, due to the hot or humid weather in summer, babies are more anxious in weaning, they will cry and sweat, and they will easily get sick if they are exposed to cool air conditioning or have unstable sleep. In addition, the hot weather in summer affects the appetite, which may cause the baby to have no appetite during the weaning period, unwilling to eat other complementary foods, and fresh complementary foods in summer are not easy to store, so the baby is prone to malnutrition or indigestion. Therefore, it is recommended to avoid summer and choose spring or fall as a better choice for weaning.