For a summer camping trip, a sleeping bag with a temperature rating between 20°F and 40°F should be adequate, depending on your location. It’s important to note that sleeping bag temperature ratings are based on the minimum temperature the insulation can keep you warm, but not necessarily comfortable. So, it’s always a good idea to choose a sleeping bag with a temperature rating that’s slightly lower than the lowest temperature you expect to encounter on your camping trip.
I hope this helps you choose the right sleeping bag for your summer camping trip!