I'm in the process right now of filling my pool after replacing the liner today. I have right at 12" of water in the pool currently, but the sun is setting. The low tonight is 69° F (about 20° C). Should I continue to fill overnight, or wait to start again in the morning? I used Matt's method of installation (mentioned in the post above mine), and there is some air gap between the liner and the wall above the water level.

Tomorrow's forecast is mostly sunny with occasional pop-up summer thunderstorms.