How to Predict the Temperature of the Water at Night

Cuss i placed a glass of water outside and tested the temperature of the water doring the different moon phases. You have to do it either at the full moon or within a few days of the full moon. The ones that are shaded don't change temperature, while the ones that are in the moonlight decrease in temperature. And just for one last time, you take a magnifying glass and you manipulate that until you're sure that it's gone down even more. That still proves the world is round. So, like, that's true again.