House Renovation - Wi-Fi Offline

We moved out of our house for 6-8 for renovation. We have no access to the internet. How can I create a watering schedule or adjust the watering times for each zone. When using the manual option from the controller, I can only water each zone for 3 minutes.

You could possibly use your phone hot spot, and reconfigure the wifi on the Rachio to the hot spot. Make any changes you need and as long as you are using fixed schedules, they should run indefinitely (without weather intelligence).