30 the last 2 nights here in Eloy, AZ which is about half way between Tucson and Phoenix. Warmed up to the mid 60's during the day. Eloy is about 1,500' elevation.
The low temp comes for about 2 hours between 4-6 am so no worry about freezing water hoses. If worried about that just carry an extra water hose.
Forecast for this month is for low temps in the mid 30's to low 40's and day time temps in the 60's and 70's.
Come down and enjoy the 'winter'.