The high temperatures this summer have been nearly 115F in our Yard in Phoenix, Arizona. And our Forge still makes ice. We designed the heat transfer coils, the compressor, the insulation, and the filtration/disinfection systems to operate under the most grueling summer conditions--except direct sunlight. Our experiences here in the desert have taught us that when the ambient air temps are above 100F, the added thermal load of direct sunlight will cause the water temps in the Forge to rise. Keep you Forge in the shade during the hot summer, and you'll have a freezing cold experience!