In 15 Seconds
- Describes a day with low air temperature.
- Used for weather and atmosphere, not cold objects.
- A perfect icebreaker for winter small talk.
Meaning
This phrase is the standard way to describe a day when the temperature is low. It is what you say when you're reaching for a sweater or dreaming of a hot bowl of ramen.
Key Examples
3 of 6Talking to a neighbor while walking the dog
今日は本当に寒い日ですね。
It is a really cold day today, isn't it?
Deciding on dinner with a partner
寒い日は、温かいスープが食べたくなります。
On cold days, I start craving hot soup.
Writing a formal seasonal greeting in a letter
寒い日が続いておりますが、いかがお過ごしでしょうか。
Cold days are continuing; how have you been faring?
Cultural Background
The first cold wind of late autumn is called 'Kogarashi Ichigo'. It's a major news event and officially marks the start of the 'cold day' season. Kyoto is famous for 'Sokobie', a type of cold that feels like it's rising from the floor. People often talk about 'cold days' there with a specific sense of physical endurance. In Japan's northernmost island, a 'cold day' can mean -20°C. The vocabulary for cold is much more diverse there, but '{寒い|さむい}{日|ひ}' remains the base. Seasonal greetings in business emails often start with a reference to the cold. It shows you are cultured and mindful of the other person's well-being.
The 'Ne' Magic
Always add 'ne' at the end ({寒い|さむい}{日|ひ}ですね) to sound friendly and invite the other person to agree.
Don't touch!
Never use this for ice cream or cold drinks. Use 'tsumetai' instead.
In 15 Seconds
- Describes a day with low air temperature.
- Used for weather and atmosphere, not cold objects.
- A perfect icebreaker for winter small talk.
What It Means
寒い日 is a simple combination of the adjective 寒い (cold) and the noun 日 (day). In Japanese, adjectives like 寒い can directly describe nouns without any extra particles. It specifically refers to the temperature of the air or the environment. It is the ultimate conversation starter during the winter months.
How To Use It
You can use 寒い日 as the subject of your sentence or to set the scene. If you want to say 'On a cold day,' you just add the particle に to get 寒い日に. It is very flexible. You can use it in short, punchy sentences or long, poetic ones. It is one of the first phrases you will use to make small talk with neighbors.
When To Use It
Use this when the weather forecast predicts a drop in temperature. It is perfect for texting a friend to suggest staying indoors. Use it at work when you walk into the office shivering. It is also great for social media captions of your winter outfits. Basically, if you feel a chill in the air, this phrase is your best friend.
When NOT To Use It
Do not use 寒い for cold objects like ice cream or a beer. For things you touch, use 冷たい (tsumetai) instead. If you call a cold soda a 寒い drink, people might think the drink is telling bad jokes! Also, avoid using it if the weather is just 'cool' or 'brisk.' In those cases, 涼しい (suzushii) is a better fit.
Cultural Background
Japan takes its four seasons very seriously. Talking about the weather is a vital social lubricant. In winter, the concept of 'warmth' becomes a central theme in food and home life. 寒い日 is often the catalyst for eating 鍋 (nabe) or huddling under a こたつ (kotatsu). It is not just about the temperature; it is about the shared experience of the season.
Common Variations
You will often hear 寒い朝 (samui asa) for a cold morning. 寒い夜 (samui yoru) is common for cold nights. If it is exceptionally freezing, people might say 極寒の日 (gokkan no hi). For a slightly more formal vibe, you might hear 寒冷な日 (kanrei na hi) in weather reports. But for daily life, 寒い日 is the undisputed king of winter talk.
Usage Notes
This phrase is incredibly stable across all levels of formality. The only thing that changes is the verb or ending you attach to it (e.g., `だ` for casual, `です` for polite).
The 'Ne' Magic
Always add 'ne' at the end ({寒い|さむい}{日|ひ}ですね) to sound friendly and invite the other person to agree.
Don't touch!
Never use this for ice cream or cold drinks. Use 'tsumetai' instead.
Seasonal Greetings
Using this phrase in the first sentence of an email in winter makes you look very professional.
Examples
6今日は本当に寒い日ですね。
It is a really cold day today, isn't it?
A very common way to acknowledge the weather with others.
寒い日は、温かいスープが食べたくなります。
On cold days, I start craving hot soup.
Uses the phrase to explain a desire or preference.
寒い日が続いておりますが、いかがお過ごしでしょうか。
Cold days are continuing; how have you been faring?
A classic formal opening for winter correspondence.
こんな寒い日は、家でゲームしたいな。
On a cold day like this, I just want to play games at home.
Expressing a relatable feeling of wanting to stay indoors.
寒い日は、猫がこたつから出てきません。
On cold days, the cat won't come out from under the kotatsu.
A funny, relatable scene in a Japanese household.
あの寒い日のことを、今でも覚えています。
I still remember that cold day.
Adds a touch of nostalgia or significance to a specific day.
Test Yourself
Choose the correct word to complete the sentence about the weather.
{今日|きょう}はとても（ ）{日|ひ}ですね。
'Samui' is the correct word for a cold day/weather.
Fill in the blank with the correct particle or ending.
{寒い|さむい}{日|ひ}（ ）お{鍋|なべ}を{食|た}べます。
The particle 'ni' is used to indicate the time or occasion (on a cold day).
Complete the dialogue.
A: {明日|あした}は{寒い|さむい}{日|ひ}になりますか？ B: ええ、（ ）。
The response should confirm the question using the same adjective.
Match the phrase to the situation.
Which phrase would you use when meeting a coworker on a snowy morning?
It's the standard polite greeting for cold weather.
🎉 Score: /4
Visual Learning Aids
When to use Samui vs Tsumetai
Samui (Air/Weather)
- • Winter
- • Morning air
- • A cold room
- • The wind
Tsumetai (Touch/Objects)
- • Ice cream
- • Cold beer
- • Snowballs
- • Metal in winter
Practice Bank
4 exercises{今日|きょう}はとても（ ）{日|ひ}ですね。
'Samui' is the correct word for a cold day/weather.
{寒い|さむい}{日|ひ}（ ）お{鍋|なべ}を{食|た}べます。
The particle 'ni' is used to indicate the time or occasion (on a cold day).
A: {明日|あした}は{寒い|さむい}{日|ひ}になりますか？ B: ええ、（ ）。
The response should confirm the question using the same adjective.
Which phrase would you use when meeting a coworker on a snowy morning?
It's the standard polite greeting for cold weather.
🎉 Score: /4
Frequently Asked Questions
10 questionsIf you call a person 'samui', it usually means their joke was bad or 'lame', not that they are literally cold.
'Samui' is a general state. 'Hiekomu' implies the temperature is actively dropping or 'chilling down'.
It's neutral. To make it formal, say '{今日|きょう}は{寒冷|かんれい}な{気候|きこう}でございます'.
Use '{寒|さむ}くなってきました' (samuku natte kimashita).
Yes, '{寒い|さむい}{風|かぜ}' means a cold wind.
The opposite is '{暑|あつ}い{日|ひ}' (atsui hi) for a hot day.
It's a cultural way to show harmony and acknowledge the shared environment without being intrusive.
Yes, '{部屋|へや}が{寒|さむ}いです' (The room is cold) is perfectly natural.
Young people often say 'samu!' or 'samu-ssu' (short for samui desu).
In this context, yes. It can also mean 'sun', but here it refers to the 24-hour period.
Related Phrases
{肌寒|はだざむ}い
similarChilly
{冷|つめ}たい
contrastCold to the touch
{暑|あつ}い{日|ひ}
contrastA hot day
{真冬日|まふゆび}
specialized formA day where the temperature never rises above freezing
