[SAI_Peregrinus]

Shielding from the sun only happens when it's dark on that side of the moon. So half the month, effectively. But shielding from Earth can be constant, thanks to tidal locking. Particularly nice for really big radio telescopes.

[TeMPOraL]

> So half the month, effectively.

A little less, if nestled in the crater as the quoted idea would have it.

[ceejayoz]

Even better: use one of the deep lava tube pits. https://futurism.com/nasa-holes-moon-comfortable-temperature