In mid summer when its hot you can bet that the bass are probably going to be deep, not always but a lit of the time they will be. So a Texas or a Carolina rigged worm is probably your best option.
They are both great catchers but when to use which? I am going to try shed some light on this subject so you can have another bass fishing technique at your disposal to help on those hot summer days when the bass are not biting.
Carolina rigs are good for covering a larger bottom area to find structure, ill use a heavy sinker (3/4 to 1 ounce) and will quickly scan the area until I find some rocks or stems or weeds. Then i slow it down a lot and work it through the cover, in this way I can quickly cover more area and find those bass holding areas. So the Carolina rig is good search bait with the bonus of catching the fish once you find the structure. Bass love structure remember that.
The Texas rig is good when fishing specific areas, steep drop offs and heavy cover. a Carolina rig will tend to snag more and can not get into these all holes in grass clumps or bushes. The Texas rig is good for these types of situations. When fishing steep banks and ledges and rock piles the Texas rig can be slowly be dropped down such structure, where the Carolina rig will tend to pull your worm down too fast.
The size of your weight is also worth considering, Tungsten weights are harder and smaller for the same weight and therefore transmit more feel for what's going on down there.
Heavy weights are good in summer because they often admit a strike with their fast fall, get down quicker and give you a better feel when the wind is blowing.
A lightweight will make your worm sink slower and may get a lazy shy bass to take. i would begin with heavier weights an progress to lighter if the action is a little slow.
Your low sink rate will also be affected by the type of worm used, bulky worms and ones with legs and bigtails will slow the sink rate, i would use these with heavy weights and move them in an aggressive way.
These types of worms will move a lot of water and appeal to the bigger bass that are hunting. Swim these worms and bounce them along the surface with either a Texas or a Carolina rig to get the best out of them.
When the day is proving difficult to get a take, you can try using slim worms to try lure then out of their cover. I would rig up a straight tailed thin worm and light weight slowly fish them past cover on a Carolina rig, you can even try small floating worms on a Carolina rig to slow the sinking right down and create a great bouncing action on the ground.
Remember there are no hard and fast rules, use these bass fishing techniques as a guideline and learn from it and experiment.