Going to have to know a lot more about your setup to dive into it, but with the time of year, I don’t think that is too far off. Mine is pushing about 2 weeks between waterings, and we are still in the mid to upper 80’s right now.
That being said, if the previous owner was watering everyday, multiple times a day, the roots of your plants are likely very shallow, and will suffer if you leave the flex daily alone. We can do some tweaks with root depth and crop coefficient to force Rachio to water more frequently, and slowly build that root structure up to go deeper for water.
Can you post screenshots of your basic and advanced settings, along with a rundown of your equipment (drip emitter size, quantity per plant).