The average temperature in June-August is about 106 degrees.
However, compared to Florida, Texas or many other east coast
cities it is NOT really unbearable. Our average humidity is usually about 15%; as compared to over 75% elsewhere. You hike, run or play tennis early and plan activities after the suns goes down! Hey, 8 1/2 months a year our weather is near ideal so I am Not complaining. :+)