If the basements are not fully finished spaces the solution is easy.

Preferably in the north-east corner, build a pair of walls and a ceiling, but no floor and don't cover the bare concrete basement walls except for the upper parts that are within 3' of the ground level outside.

Now insulate all the new walls very well, especially the ceiling and the portions of outside walls.

What this does is create a situation where the cold concrete floors and lower walls will act as a refrigeration system.

If you want to take it one step further put a small coil (a used A/C condensor coil works really well in a box with a small fan like those used to cool a computer blowing across it, and run the water line leading to a non-potable water use, like the washing machine or outside tap, through it. You will need a system to catch and dispose of the condensate. When you run water, the fan will use the cold water to a) remove humidity, and b) lower the temperature.

I did much the same thing in my parents new house and their 'cold room' never gets above 60° F.

Best of luck.

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