Frost typically occurs at temperatures below which degree Celsius?

Frost typically occurs when temperatures drop below 0°C. This is because frost forms when moisture in the air condenses and freezes on surfaces as the temperature falls below the freezing point of water. When the air temperature reaches or dips below 0°C, water vapor changes from a gas to a solid form, creating frost.

Though temperatures below 0°C will also lead to frost, the threshold for frost formation begins at zero degrees Celsius, as this is the point at which water freezes. Thus, the presence of frost is most commonly associated specifically with temperatures at or below this critical freezing point.