Which is hotter 30C or 30F?

30 degrees Celsius is hotter than 30 degrees Fahrenheit. This is because the Celsius scale is based on the freezing and boiling points of water at sea level, with 0°C being the freezing point and 100°C being the boiling point. In contrast, the Fahrenheit scale is based on a scale where 32°F is the freezing point and 212°F is the boiling point of water at sea level. Therefore, 30°C is equivalent to 86°F, making it hotter than 30°F.