May-Sept: Lows 60's - 80's Highs 90's - 100's Oct-Apr: Lows 40's - 50's Highs 60's - 80's. May and June are actually quite bearable due to low humidity. That is if your body can stand humidities in the <10% range. Less than 5% humidity is not uncommon.
I like low humidity but that's too low. My nose would be bleeding all the time and I would scratch my skin raw.