The freezing point of water in Celsius is 0 degrees. This temperature signifies the point at which water transitions from its liquid state to solid ice under standard atmospheric pressure. This freezing point is critical in both scientific and everyday contexts, affecting everything from weather patterns to the functioning of ecosystems. It also serves as a fundamental reference point in temperature scales. In practical applications, it is essential for various processes, including food storage, climate studies, and meteorology. Interestingly, the freezing point can change with the presence of dissolved substances, like salt, which lowers the freezing point of water.