This might sound weird but .... popsicles made from dill pickle juice are absolutely the best on a hot day.
I believe there are commercially made ones -- some enterprising guy in Texas makes them -- and they are good for you as they replace electrolytes, etc., in a hurry. (I also think some football coaches have their players drink pickle juice as a sports drink; you can Google it.)
Anyway get a set of molds -- mine were about $3 at IKEA and pour the juice of your favorite pickles in them, and freeze. On hot day, you can't beat it!