sub-zero temperatures
Dangerously cold weather
Sub-zero temperatures are those below zero on a given scale—typically Fahrenheit in American usage, Celsius elsewhere.
The phrase emphasizes extreme cold: Sub-zero temperatures are expected overnight.
In casual speech, sub-zero sometimes just means bitterly cold, even if technically above zero.
- freezing pointTemperature of phase transition
- below freezingUnder water's solidification point
- deep freezeIntense prolonged cold
- cold snapBrief period of bitter chill
- bitter coldExtremely low temperature
frost warning · refrigeration · chilliness · ice formation · hypothermia · icebreakers · frostbite · cryogenics · acclimatization · snow · cold-heartedness · snowplows · extremophiles · cryosphere · glaciation · hail · dormancy · hibernation
sub-zero temperaturesextreme heat
Severe high temperature
scorching heat · sweltering heat · heat wave · boiling hot · oppressive heat
sub-zero temperaturesextreme heat
Severe high temperature
mild weather · temperate climate · room temperature · moderate temperatures · warm weather
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