Below is the average highs and low temperatures for St Johns . With extreme lows in the winter dropping below 20F (-7C) at night a major challenge for the house design is to store sufficient heat during the day and retain that heat through the night.

  With Arizona ’s sun light solar passive techniques will work well but come summer would overheat the house. Eaves, or overhangs can be constructed to block the summer sun from entering the interiors of the house in summer but the question is when during the year the sun needs to be blocked.