Hello, I’m Kodak.
On a winter morning in Japan, one of the most natural reactions you will hear is:
Samui!
It’s cold!
寒い (samui) describes cold weather, air, seasons, rooms, and the feeling of being cold.
For a cold drink, cold food, or an object that feels cold to the touch, Japanese normally uses 冷たい (tsumetai).
寒い (samui) means “cold” when the surrounding air or environment has a low temperature and makes a person feel cold.
今日は寒いです。
Kyō wa samui desu.
It is cold today.
In this article, you will learn:
② how to pronounce and write it
③ how to use and conjugate it as an い-adjective
④ the important difference between 寒い and 冷たい
⑤ how it differs from 涼しい, 肌寒い, 冷える, and 凍える
⑥ how Japanese people talk about winter weather
⑦ the regional differences in Japan’s winter climate
⑧ natural examples, casual speech, figurative meanings, and FAQ
What Does 寒い (Samui) Mean?
寒い describes a low environmental temperature that feels uncomfortable to a person. It is commonly used for weather, seasons, air, days, nights, rooms, and places.
⇒ cold
⇒ chilly
⇒ uncomfortably cold
⇒ used for weather, air, climate, seasons, rooms, and places
⇒ also used when the speaker personally feels cold
今日は寒い。
Kyō wa samui.
It is cold today.
この部屋は寒い。
Kono heya wa samui.
This room is cold.
外に出ると寒い。
Soto ni deru to samui.
It is cold when you go outside.
When you walk outside and say 寒い！, it naturally means both “It’s cold!” and “I feel cold!”
The surrounding air temperature is low, and your whole body feels the cold environment.
How to Pronounce 寒い
Hiragana: さむい
Romaji: samui
Mora: さ・む・い (3 morae)
Pronounce the word in three short Japanese beats:
A short “sah” sound.
む (mu)
A light “mu” sound; do not make it too long.
い (i)
A short “ee” sound.
Japanese rhythm is clearer if you think in three beats: sa-mu-i.
Kanji, Hiragana, and Katakana Forms
All hiragana: さむい
Katakana for emphasis: サムイ
The normal spelling is 寒い. The kanji 寒 appears in many words connected with cold weather and winter.
寒気 (samuke / kanki) — chills / cold air mass, depending on reading and context
寒波 (kanpa) — cold wave
防寒 (bōkan) — protection against cold
寒冷 (kanrei) — cold; frigid
寒い → 寒くない → 寒かった → 寒くて
How to Use 寒い
寒い is an い-adjective. It can appear directly before a noun or at the end of a sentence.
1. 寒い + Noun
a cold day
寒い冬
a cold winter
寒い朝
a cold morning
寒い夜
a cold night
寒い部屋
a cold room
寒い地域
a cold region
寒い日が続いている。
Samui hi ga tsuzuite iru.
The cold days are continuing.
2. ～は寒い
今日は寒いです。
Kyō wa samui desu.
It is cold today.
一月の札幌は寒い。
Ichigatsu no Sapporo wa samui.
Sapporo is cold in January.
3. 寒くて～
Change 寒い to 寒くて when connecting the cold to another condition or result.
↓ remove い
寒
＋ くて
寒くて
寒くて眠れない。
Samukute nemurenai.
It is so cold that I cannot sleep.
外は寒くて、手が痛くなった。
Soto wa samukute, te ga itaku natta.
It was so cold outside that my hands began to hurt.
4. 寒かった
昨日はとても寒かった。
Kinō wa totemo samukatta.
Yesterday was very cold.
5. 寒くない
今日は昨日ほど寒くない。
Kyō wa kinō hodo samukunai.
Today is not as cold as yesterday.
6. 寒くなってきた
This common phrase describes the weather gradually becoming colder.
夕方になって寒くなってきた。
Yūgata ni natte samuku natte kita.
It is getting colder now that evening has come.
Useful Conjugations
寒くない — is not cold
寒かった — was cold
寒くなかった — was not cold
寒くて — cold, so / cold and
寒ければ — if it is cold
寒さ — coldness; the cold
寒くなる — become cold
The adjective itself changes for tense and negation:
寒かったです, 寒くないです, and 寒くなかったです.
How to Say “It’s Cold” Naturally in Japanese
The most natural short reaction is simply:
It’s cold! / I’m cold!
Simply saying 寒い is more natural than repeatedly saying 私は.
It’s cold! / I’m cold!
寒いね。
It’s cold, isn’t it?
今日は寒いですね。
It’s cold today, isn’t it?
すごく寒い。
It’s very cold.
寒すぎる。
It’s too cold.
急に寒くなったね。
It suddenly got cold, didn’t it?
寒い vs 冷たい: The Most Important Difference
English uses “cold” for both, but Japanese usually distinguishes the cold environment from a cold object.
Cold weather, air, season, room, or environment
⇒ your whole body feels cold because of the surroundings
冷たい (tsumetai)
A cold object, drink, food, liquid, surface, hand, or touch
⇒ something itself has a low temperature
Is the surrounding environment cold, or is one specific thing cold?
Environment and weather ⇒ 寒い
A thing you touch, eat, drink, or feel directly ⇒ 冷たい
今日は寒い。
It is cold today.
⇒ The surrounding air feels cold.
この水は冷たい。
This water is cold.
⇒ The water itself has a low temperature.
部屋が寒い。
The room is cold.
⇒ The environment inside the room is cold.
床が冷たい。
The floor is cold.
⇒ The surface feels cold to the touch.
手が冷たい。
My hands are cold.
⇒ A body part feels cold to the touch.
Your whole-body reaction to the environment is 寒い. The hand itself is 冷たい.
寒い vs 涼しい: Cold or Pleasantly Cool?
pleasantly cool and refreshing
寒い (samui)
cold enough to feel uncomfortable or to need warmth
風が涼しい。
Kaze ga suzushii.
The breeze feels pleasantly cool.
風が強くて寒い。
Kaze ga tsuyokute samui.
The strong wind makes it feel cold.
The difference is partly subjective: 涼しい feels comfortable and refreshing, while 寒い feels unpleasantly cold.
寒い vs 肌寒い
肌寒い (hadasamui) literally suggests that the skin feels cold. It commonly means chilly or a little cold.
general “cold”; strength depends on context
肌寒い
slightly cold or chilly, especially when the cool air is felt on the skin
often used during seasonal changes, mornings, evenings, or after rain
今朝は少し肌寒い。
Kesa wa sukoshi hadasamui.
It is a little chilly this morning.
冬の朝は寒い。
Fuyu no asa wa samui.
Winter mornings are cold.
寒い vs 冷える
冷える (hieru) is a verb meaning that something becomes cold or that the body becomes chilled.
an adjective describing a cold environment or the feeling of cold
冷える
a verb describing a drop in temperature or the body becoming chilled
今日は寒い。
It is cold today.
夜になると冷える。
It gets cold at night.
足元が冷えてきた。
Ashimoto ga hiete kita.
My feet are starting to get chilled.
If you want to describe the body becoming chilled, 体が冷える is more natural.
寒い vs 凍える
凍える (kogoeru) is much stronger. It means to be numb, frozen, or shivering from severe cold.
cold; the general expression
凍える
to freeze, shiver, or become numb from intense cold
外は寒い。
It is cold outside.
手が凍えそうだ。
Te ga kogoesō da.
My hands feel like they are going to freeze.
寒い vs 寒々しい
寒々しい (samuzamushii) means that something looks extremely cold, bleak, bare, or desolate.
the weather, air, or room actually feels cold
寒々しい
a scene, room, or appearance looks cold, bleak, empty, or desolate
外は寒い。
It is cold outside.
葉の落ちた木々が寒々しく見える。
Ha no ochita kigi ga samuzamushiku mieru.
The leafless trees look bleak and wintry.
How Japanese People Talk About Winter Cold
Weather is common small talk in Japanese. During winter, phrases such as 寒いですね are natural conversation starters.
It’s cold, isn’t it?
毎日寒いですね。
It’s cold every day, isn’t it?
今朝は冷えますね。
It is chilly this morning, isn’t it?
今日は一段と寒いですね。
It is especially cold today, isn’t it?
寒い日が続きますね。
These cold days keep continuing, don’t they?
本当ですね。 — It really is.
寒いですね。 — Yes, it’s cold.
昨日より寒いですね。 — It’s colder than yesterday.
What Is Winter in Japan Like?
Japan stretches from subarctic northern regions to subtropical southern islands, so winter conditions vary greatly.
Very cold winters. The Sea of Japan side and mountainous areas can receive heavy snow.
Eastern Japan
Cold winters. The Sea of Japan side and mountain areas can receive very heavy snow, while many Pacific-side areas have different winter conditions.
Western Japan
Generally milder than northern Japan, but cold spells and snow can still occur.
Okinawa and Amami
Mild winters compared with the main islands.
The Japan Meteorological Agency explains that Japan’s typical winter pattern is influenced by a strong Siberian high-pressure system and Aleutian low-pressure system. Northwesterly seasonal winds bring cold air toward Japan, often producing heavy snow on the Sea of Japan side.
Northern areas, mountains, and many places on the Sea of Japan side can receive large amounts of snow, while snow is less frequent in many major Pacific-side metropolitan areas.
寒い describes the speaker’s experience, not one universal temperature.
Japanese Weather Terms for Cold Days
Japanese weather terminology includes specific expressions based on daily temperatures.
A day when the minimum temperature falls below 0°C.
真冬日 (mafuyubi)
A day when the maximum temperature remains below 0°C.
氷点下 (hyōtenka)
below freezing; below 0°C
寒波 (kanpa)
a cold wave
冷え込み (hiekomi)
a sharp drop in temperature; severe chill
On a 真冬日, even the day’s maximum remains below freezing, so the entire day stays under 0°C.
Useful Expressions Built from 寒い
coldness; the cold
寒がる (samugaru)
to show or say that one feels cold
寒がり (samugari)
a person who is sensitive to cold
寒すぎる (samusugiru)
to be too cold
寒くなる (samuku naru)
to become cold
寒さに弱い (samusa ni yowai)
to be bad at handling cold weather
寒さに慣れる (samusa ni nareru)
to get used to the cold
寒さをしのぐ (samusa o shinogu)
to keep out, escape, or endure the cold
寒がる describes someone showing signs that they feel cold.
私は寒い。
I feel cold.
子どもが寒がっている。
The child is showing that they feel cold.
Conversation Examples
Winter Small Talk
Kyō wa samui desu ne.
It’s cold today, isn’t it?
B: 本当ですね。風も強いです。
Hontō desu ne. Kaze mo tsuyoi desu.
It really is. The wind is strong, too.
Turning on the Heater
Kono heya, samukunai?
Isn’t this room cold?
B: うん。暖房をつけよう。
Un. Danbō o tsukeyō.
Yeah. Let’s turn on the heater.
Talking About Japan’s Winter
Nihon no fuyu wa dō?
What is winter in Japan like?
B: 地域によるけど、北海道はとても寒いよ。
Chiiki ni yoru kedo, Hokkaidō wa totemo samui yo.
It depends on the region, but Hokkaido is very cold.
A Cold Morning
Kesa wa samukatta ne.
It was cold this morning, wasn’t it?
B: うん。車の窓が凍っていたよ。
Un. Kuruma no mado ga kōtte ita yo.
Yeah. The car windows were frozen.
Choosing Clothes
Kōto o kita hō ga ii kana.
Do you think I should wear a coat?
B: 夜は寒くなるから、持っていったほうがいいよ。
Yoru wa samuku naru kara, motte itta hō ga ii yo.
It will get cold at night, so you should take one.
Natural Example Sentences with 寒い
今日は朝から寒い。
Kyō wa asa kara samui.
It has been cold since this morning.
外はとても寒いです。
Soto wa totemo samui desu.
It is very cold outside.
寒いから、暖かい服を着てね。
Samui kara, atatakai fuku o kite ne.
It is cold, so wear warm clothes.
今年の冬は去年より寒い。
Kotoshi no fuyu wa kyonen yori samui.
This winter is colder than last winter.
日が沈むと急に寒くなった。
Hi ga shizumu to kyū ni samuku natta.
It suddenly became cold after the sun set.
寒くて窓を閉めた。
Samukute mado o shimeta.
It was cold, so I closed the window.
今日は昨日ほど寒くない。
Kyō wa kinō hodo samukunai.
Today is not as cold as yesterday.
この寒さにはまだ慣れていない。
Kono samusa ni wa mada narete inai.
I am not used to this cold yet.
一月は寒い日が多い。
Ichigatsu wa samui hi ga ōi.
There are many cold days in January.
部屋が寒すぎて集中できない。
Heya ga samusugite shūchū dekinai.
The room is too cold for me to concentrate.
風がないと、それほど寒く感じない。
Kaze ga nai to, sorehodo samuku kanjinai.
When there is no wind, it does not feel that cold.
山の上は町より寒い。
Yama no ue wa machi yori samui.
It is colder on the mountain than in town.
まだ十一月なのに寒い。
Mada jūichigatsu na noni samui.
It is cold even though it is only November.
寒い日は温かいスープが飲みたくなる。
Samui hi wa atatakai sūpu ga nomitaku naru.
On cold days, I start wanting warm soup.
夜になると寒さが厳しくなる。
Yoru ni naru to samusa ga kibishiku naru.
The cold becomes more severe at night.
雪が降ると、町がいつもより寒く感じる。
Yuki ga furu to, machi ga itsumo yori samuku kanjiru.
When it snows, the town feels colder than usual.
How 寒い Is Used in Anime, Manga, and Casual Speech
寒い is ordinary everyday Japanese, so it appears frequently in anime, manga, dramas, and games.
It’s cold!
寒すぎる！
It’s way too cold!
うわ、寒っ！
Whoa, cold!
こんな寒い日に外へ行くの？
You’re going outside on a cold day like this?
寒くて動きたくない。
It’s so cold that I don’t want to move.
さっむい！ strengthens the reaction: “It’s sooo cold!”
寒っ！ is a clipped exclamation: “Cold!”
Learn standard 寒い first and recognize these as casual variations.
Figurative Meanings of 寒い
寒い can also describe something emotionally empty, embarrassing, unfunny, poor, or lacking substance.
寒いギャグ: A Bad or Unfunny Joke
a painfully unfunny or embarrassing joke
そのギャグ、寒いよ。
That joke is painfully unfunny.
懐が寒い: To Be Short of Money
Futokoro ga samui.
I am short of money. / My wallet is feeling light.
お寒い内容: Poor or Inadequate Content
poor, inadequate, or unimpressive content
結果はお寒いものだった。
The results were poor and disappointing.
Origin and History of 寒い
The modern adjective 寒い comes from the classical Japanese form さむし (samushi).
Dictionary definitions show that the core meaning has long been the unpleasant physical feeling caused by low temperature. From that physical image, the word later developed figurative uses connected with fear, emotional emptiness, poor quality, unfunny jokes, and lack of money.
Low temperature makes the body feel cold
↓
Fear makes the body shiver
↓
An empty or awkward situation feels emotionally cold
↓
寒いギャグ / 懐が寒い / お寒い内容
For learners, the most useful distinction is practical:
environment ⇒ 寒い
specific cold thing ⇒ 冷たい
Common Beginner Mistakes
Mistake 1: Using 寒い for Cold Food or Drinks
○ 冷たい水
cold water
× 寒いジュース
○ 冷たいジュース
a cold drink
Mistake 2: Using 冷たい for the Weather
○ 今日は寒い。
It is cold today.
Mistake 3: Saying 私は寒い Too Often
私は寒い can be grammatical in context, but Japanese usually omits the subject. Simply saying 寒い is more natural.
Mistake 4: Saying 手が寒い
Usually unnatural when describing the hand’s temperature.
○ 手が冷たい。
My hands are cold.
○ 手が冷える。
My hands get chilled.
Mistake 5: Assuming 寒い Always Means Severe Cold
a little cold
かなり寒い
quite cold
とても寒い
very cold
ものすごく寒い
extremely cold
寒すぎる
too cold
Mistake 6: Treating Japan as One Winter Climate
Japan’s winter varies by latitude, elevation, coast, and regional weather patterns. Avoid assuming that Hokkaido, Tokyo, the Sea of Japan coast, and Okinawa all experience the same conditions.
FAQ About 寒い
What does samui mean in Japanese?
寒い (samui) means “cold” when describing weather, air temperature, a season, a room, or the speaker’s feeling of being cold.
How do you write samui in Japanese?
It is normally written 寒い. The all-hiragana form is さむい.
How do you say “It’s cold” in Japanese?
Simply say 寒い. A polite sentence is 今日は寒いです, meaning “It is cold today.”
What is the difference between 寒い and 冷たい?
寒い describes cold weather, air, seasons, rooms, and the whole-body feeling of cold. 冷たい describes a cold object, drink, food, liquid, surface, hand, or touch.
Is 寒い an い-adjective?
Yes. Its common forms include 寒くない, 寒かった, 寒くなかった, 寒くて, and 寒ければ.
Can 寒い describe a room?
Yes. この部屋は寒い means “This room is cold,” referring to the environment or air inside it.
What is the difference between 寒い and 涼しい?
涼しい means pleasantly cool and refreshing. 寒い means cold enough to feel uncomfortable.
What is the difference between 寒い and 肌寒い?
寒い is the general word for cold. 肌寒い usually means chilly or slightly cold, especially when cool air is felt on the skin.
How do you say “too cold” in Japanese?
Say 寒すぎる. The polite form is 寒すぎます.
What is the opposite of 寒い?
暑い means hot. 暖かい means comfortably warm.
Does 寒い have a slang meaning?
Yes. 寒いギャグ means a painfully unfunny or embarrassing joke. The word can also describe poor or emotionally empty content.
How cold is winter in Japan?
Conditions differ greatly by region. Northern Japan has very cold winters, eastern Japan has cold winters, western Japan generally has moderately cold winters, and Okinawa and Amami have mild winters.
Related Japanese Winter and Cold Vocabulary
冷たい (tsumetai) — cold to the touch
涼しい (suzushii) — pleasantly cool
肌寒い (hadasamui) — chilly; a little cold
冷える (hieru) — to become cold; to get chilled
凍える (kogoeru) — to freeze or shiver from severe cold
冷え込む (hiekomu) — for the temperature to drop sharply
寒波 (kanpa) — cold wave
大雪 (ōyuki) — heavy snow
吹雪 (fubuki) — snowstorm; blizzard
初雪 (hatsuyuki) — first snow of the season
霜 (shimo) — frost
氷点下 (hyōtenka) — below freezing
冬日 (fuyubi) — day with a minimum below 0°C
真冬日 (mafuyubi) — day with a maximum below 0°C
防寒 (bōkan) — protection against cold
寒い ⇒ cold weather, air, room, or feeling
冷たい ⇒ a cold object, drink, food, or touch
涼しい ⇒ pleasantly cool
Those three cover the most important beginner distinctions.
Summary: The Meaning and Usage of 寒い
寒い means “cold” for weather, air temperature, seasons, rooms, environments, and the speaker’s feeling of cold.
● Writing
Kanji: 寒い
Hiragana: さむい
Romaji: samui
● Core image
The surrounding air temperature is low, and your whole body feels the cold environment.
● Grammar
It is an い-adjective:
寒くない / 寒かった / 寒くて / 寒ければ
● Most important distinction
寒い = cold weather, air, room, or whole-body feeling
冷たい = a cold object, drink, food, surface, or body part
● Related words
涼しい = pleasantly cool
肌寒い = chilly or slightly cold
冷える = become chilled
凍える = freeze or shiver from severe cold
● Natural reaction
寒い！ = It’s cold! / I’m cold!
The environment is cold ⇒ 寒い
The thing is cold ⇒ 冷たい
Once that distinction feels natural, Japanese winter conversations become much easier!
References
- Kotobank: 寒い — dictionary meanings, the classical form さむし, figurative meanings, and usage.
- Kotobank Progressive Japanese–English Dictionary: 寒い — English translations and natural example phrases.
- Japan Meteorological Agency: General Information on Climate of Japan — regional differences in Japan’s winter climate.
- Japan Meteorological Agency: Overview of Japan’s Seasonal Weather — Japan’s winter pressure pattern, seasonal winds, cold air, and snowfall.
- Japan Meteorological Agency: Temperature Terminology — definitions of 冬日 and 真冬日.
- Japan National Tourism Organization: Winter in Japan — overview of winter travel, snowfall, and regional variation.