Hot weather makes me hungry, so I cook anyhow, but make different meals and much later in the day for my main meal than in cold weather.
A sandwich or two at midday.
Dinner between 7 and 9 in the evening.
Cold soups such as gazpacho, either the classic tomato one or the asparagus version, plain youghurt diluted with buttermilk and with sugar and lemon juice added, served reasonably cold, but not directly from the fridge.
Alternatives could be tuna from a tin with black olives and a hard-boiled egg, or fruit juice heated and thickened with potato flour than stood to cool before eating (prepare in the morning).
Frequently, I am so hungry I just make whatever I would at any other time of the year - meat balls with boiled potatoes, an omelette, or anything else, I feel like.