I didn't really like going to the bathroom in the middle of the night because the house was so frigid.
frigid を使って次のように言えます。
ーI didn't really like going to the bathroom in the middle of the night because the house was so frigid.
「家がすごく寒かったので、夜中にトイレに行くのがすごく嫌だった」
frigidの代わりにfreezing cold を使っても言えますよ。
ーI hated going to the bathroom in the house I grew up in during the night because it was always so freezing cold.
「いつもすごく寒かったので、育った家のトイレに夜中行くのが嫌だった」
ご参考まで!