Basements tend to be damper than other places in your house. This is often caused by water seeping through the concrete foundation, rising from a dirt floor or simply because of poor ventilation. This higher level of moisture in the air will end up making you feel much colder than the ambient air temperature.

Why basement is always cold?

A lot of the times the reason your basement could feel cold is that it has a high level of humidity, and without the proper ventilation set up. Basements can be damp, and when you mix that with humid air, the combination of the two will make things feel cold.

Why are basements cold in the summer?

So, in the summer a basement will be "cool" because the ground surrounding it is cool (relative to outside temperatures), and in the winter it will be "warm" because the ground surrounding it is warm (relative to outside temperatures), despite "cool" and "warm" both being the same temperature (probably about 50-60F if ...