In summer, cats may experience a decrease in appetite, but this is not a common phenomenon for all cats. The reasons that affect cats’ appetite in summer may include:

Hot weather: high temperature may make cats feel uncomfortable , leading to loss of appetite.

Reduced activity: When the weather is hot, cats may reduce their activity and consume less energy, thereby reducing their appetite.

Water loss: Increased sweating in summer may cause the cat to lose water and affect its appetite.

Environmental changes: such as the use of air conditioners, changes in family members' schedules, etc.

Food spoilage: High temperatures in summer can easily cause food to spoil, and cats may not like to eat it.