Orchids like cool weather but not necessary.
They prefer warm humid air to moist their roots.
They hate cool dry air that will result plant shock to leaf burn and dead heart / flower bud drop and also dehydrated roots.

As for me, I don't cut flower spikes of Phalaenopsis if it is green because later on another flower spike or keikes will emerge.
Take care of the spikes.

But if the spikes turns slightly yellowish, cut-off the entire spike near the base of the stem to assure another healthy growth of leaves.
Flowering slows the leaf growth because much of the hormones and nutrients are concentrated to the flowers and stems.