Don't just blindly use electrolytes if you aren't needing the slight performance boost of getting more osmolarity in your stomach. Or truly need to replenish electrolytes because you are chugging 4 or 5 bottles of water in a very short time, and risk hyponatremia.

I also have found dry climates tend to make me so comfortable and keep me dry since sweat evaporates so quickly. However they don't mean any more electrolytes are needed than when in the wet climate.