Ah... near home town.
@Superstition AZ is correct. Near the Bronco Off-Roadeo it'll likely be mid/upper-80ºs. It does get to the lower 90ºs frequently during summer, especially at the elevation Bronco Off-Roadeo is at, but but rarely above 97-98º.
Early in August monsoons are common, so there is always the possibility of extremely sticky and humid weather during the early afternoon when monsoons typically hit. By late August monsoon season starts to wrap up, so the chance for rain or oppressively humid weather is reasonably low.