If you set your timing right, it might be possible to see the moons of Jupiter. The moon is one of the easiest objects to watch, if not, during the day. Here is a list of 10 surprising space objects that can be seen in the daytime sky. In theory, you can see very bright stars (0 and 1 magnitude) with a telescope during the day, but finding them and filtering out the blue is difficult.
Each of these daylight observations is relatively difficult aside from the first three listed below, but easy if you’re prepared. If you didn’t know that the moon could be seen during the day, you better get a telescope and try it out because it’s possible.