> Water temperature is below 10C (input data would be 9.53C) I can't tell the water temperature at all without context -- could be any temperature below 10C; a

> Water temperature is below 10C (input data would be 9.53C) I can't tell the water temperature at all without context -- could be any temperature below 10C; and in the wrong context it could be confusing. "Just below"/"just under" would be a lot more accurate.