@voducngh - if the weather station that is selected has accurate temperature for your location it should do a freeze skip an hour before the scheduled watering. Be sure that freeze skip is turned on for Fixed schedules and I think it is automatically set for 0C or 32F for Flex schedules.
If one prefers a belts and suspenders approach, one can connect a temperature sensor to one of the Rachio sensor ports (configured as a rain sensor, as there is no freeze sensor) as documented here -> 'Freeze Protection' at 50 Degrees (F) Implemented