How often do I water my cherry tomato that is growing in a pot?

My husband and I decided to grow a tomato plant, in a pot. When it was colder out, I was watering it about once every 3-5 days. Now that it is getting hot, (over 103) I notice the dirt is dry almost every day in the pot. I dont want to over water it, but I dont want to under water it either. There are about 20 cherry tomato waiting to ripen on the vine as well. Should I keep the soil moist or let it dry out or just water it every day?
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