真ま冬ふゆ日び

ま

ふ

ゆ

び

Meanings

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.

今日きょうは真ま冬ふゆ日びで、最さい高こう気き温おんが氷ひょう点てん下かのままだ。
Today is a day with the temperature staying below freezing, and the high remains below zero.
真ま冬ふゆ日びが続つづくと、水すい道どう管かんが凍こおる心しん配ぱいがある。
When cold winter days continue, there is a risk of water pipes freezing.

Usage patterns

〈場ば所しょ〉で真ま冬ふゆ日びになるfor a place to have a day that never rises above 0°C
今日きょうは札さっ幌ぽろで今こん年ねん初はつの真ま冬ふゆ日びになった。
Today Sapporo had its first sub-zero-max day of the year.
真ま冬ふゆ日びが続つづくfor freezing-all-day conditions to continue for several days
この地ち域いきでは真ま冬ふゆ日びが一いっ週しゅう間かんも続つづいている。
In this region, days that stay below freezing have continued for a whole week.

Kanji

真true, reality, Buddhist sect
冬winter
日day, sun, Japan

Opposites

真ま夏なつ日びN3
真冬日 is a day whose maximum temperature stays below 0°C, while 真夏日 is a day whose maximum temperature reaches 30°C or higher.

Don't confuse with

冬ふゆ日びN3
冬日 just means any day with a minimum temperature below 0°C, whereas 真冬日 requires the maximum temperature itself to stay below 0°C, a stricter condition often confused with it.

Counted with

日にちN3
Sunday · nth day of the month; date suffix · counter for days; number of days · Japan

Built from

真ま冬ふゆ+日ひ

Etymology

Compound of 真 (ま, 'true, pure') + 冬日 (ふゆび, 'winter day'), literally 'true winter day'. The prefix 真 intensifies the meaning to indicate a day that is fully wintry, i.e., one where the temperature remains below freezing.