day with max temperature below 0°C; cold winter day
Meteorological term for a day when the highest temperature stays below freezing. Often used in weather forecasts and winter descriptions.
Today is a day with the temperature staying below freezing, and the high remains below zero.
When cold winter days continue, there is a risk of water pipes freezing.
Today Sapporo had its first sub-zero-max day of the year.
In this region, days that stay below freezing have continued for a whole week.