Since it is the dead of summer most of you, like myself, are experiencing temperatures close to 100 degrees or more during the day. As we all know, it is okay to leave Dionaea outside during the day in-order to satisfy their need for full sun. If you are doing this, please make sure that you are watering daily from above. I do not like to use the tray method because water in a tray does not last very long on a hot summer's day.
Although my plants are doing okay during the middle of the day when temperatures reach close to 100, I have found it very helpful to move them to a shady location between 12 and 3 PM. This reduces the hot summer sun wilting them and also allows them to dry out much slower. I have found that 3 hours less of direct sun has not had no adverse effects on my plants.
Also, if you have a small plant or have just transplanted I would strongly suggest avoiding
the midday sun.
I hope this helps and I'm sure that there are varying opinions on the subject,