Picture this: you just landed in Tokyo in early August. The moment you step outside the airport, the heat hits you — not just hot, but thick, pressing, inescapable. Your Japanese host says: 「今日は蒸し暑いですね。」 (It’s muggy today, isn’t it?) You nod and want to agree, but you only know 暑い (atsui, hot). Is there a difference? Can you say something more natural back?
Weather is one of the most powerful entry points into real Japanese conversation. It is not small talk filler — in Japan, talking about the weather connects you to seasonal culture, regional identity, and the social ritual of omotenashi (hospitality). This guide covers everything in one place: core vocabulary, seasonal words, forecast expressions, temperature nuances, travel phrases, nature nouns, and the mistakes English speakers most commonly make.
| Category | What you’ll learn | Key examples |
|---|---|---|
| Core weather words | Sun, rain, snow, wind, typhoon | 晴れ, 雨, 雪, 風, 台風 |
| Four seasons | Season names + cultural vocabulary | 花見, 梅雨, 紅葉, 初雪 |
| Forecast expressions | Probability, timing, alert vocabulary | 降水確率, のち, 警報 |
| Temperature adjectives | Hot vs warm vs cool vs cold — with nuance | 暑い vs 蒸し暑い, 寒い vs 冷たい |
| Small talk phrases | Natural conversation openers | 今日は暑いですね, なんか急に寒くなった |
| Nature nouns | Sky, mountains, rivers + weather collocations | 空, 山, 川, 海, 雲 |
| Travel phrases | Checking forecasts, talking to hotel staff | 明日は雨ですか？, 傘は要りますか？ |
Why Weather Vocabulary Matters in Japanese (More Than Just Small Talk)
In English, “nice weather today” is polite filler. In Japanese, weather talk is culturally loaded. Japan has four clearly defined seasons — 春（はる, spring）, 夏（なつ, summer）, 秋（あき, autumn）, 冬（ふゆ, winter）— and each season carries its own foods, festivals, emotions, and vocabulary. Knowing seasonal weather words is not just useful; it signals cultural awareness.
Weather also appears constantly in daily life: NHK news opens with the weather forecast, train delays reference rain and typhoons, and coworkers bond over the rainy season. If you can say more than 暑い（あつい, hot）and 寒い（さむい, cold）, you instantly sound more fluent and more human.
Finally, Japan’s geography means extreme weather: typhoons in late summer, humid monsoon rains in June and July, heavy snowfall in Hokkaido and the Japan Sea coast, and sudden spring heatwaves. Knowing the vocabulary is genuinely safety-relevant if you travel or live here.
Essential Weather Words
Start with the core weather nouns. These appear in forecasts, apps, and everyday speech. Each entry below includes the kanji, reading, and a natural example sentence.
| Kanji | Reading | Romaji | Meaning | Example Sentence |
|---|---|---|---|---|
| 晴れ | はれ | hare | sunny / clear | 今日は晴れです。(It’s sunny today.) |
| 曇り | くもり | kumori | cloudy | 午後から曇りになるでしょう。(It will become cloudy from the afternoon.) |
| 雨 | あめ | ame | rain | 明日は雨が降るらしい。(It seems like it will rain tomorrow.) |
| 雪 | ゆき | yuki | snow | 北海道では雪がたくさん降ります。(It snows a lot in Hokkaido.) |
| 台風 | たいふう | taifuū | typhoon | 台風が来ているので、外出しないでください。(A typhoon is coming, so please don’t go out.) |
| 霧 | きり | kiri | fog / mist | 今朝は霧が深かった。(The fog was thick this morning.) |
| 風 | かぜ | kaze | wind | 今日は風が強いですね。(The wind is strong today, isn’t it?) |
| 雷 | かみなり | kaminari | thunder / lightning | 遠くで雷が鳴っている。(Thunder is rumbling in the distance.) |
| 嵐 | あらし | arashi | storm | 嵐の前は静かだ。(It is calm before the storm.) |
| 虹 | にじ | niji | rainbow | 雨の後に虹が出た。(A rainbow appeared after the rain.) |
| 霜 | しも | shimo | frost | 朝、草の上に霜が降りていた。(There was frost on the grass in the morning.) |
| 梅雨 | つゆ | tsuyu | rainy season | 梅雨の時期は洗濯物が乾きにくい。(During the rainy season, laundry doesn’t dry easily.) |
Quick note on 雨（あめ）vs 雨（あま）: The word for rain has two readings depending on the compound. Alone or in 雨が降る, it is あめ. In compounds like 雨水（あまみず, rainwater）or 雨具（あまぐ, rain gear）, it is あま. This is a common source of confusion — don’t panic, just learn the compounds as you encounter them.
Seasons and What They Mean in Japanese
Japanese culture is deeply seasonal. Each of the four seasons has its own iconic images, events, food, and emotional register. Knowing seasonal vocabulary lets you talk about more than temperature — you can discuss the feeling of a season, which is deeply connected to how Japanese people experience the year.
| Season | Kanji / Reading | Months (approx.) | Key Vocabulary | Cultural Icon |
|---|---|---|---|---|
| Spring | 春（はる） | March–May | 桜（さくら, cherry blossom）, 花見（はなみ, flower viewing）, 暖かい（あたたかい, warm）, 花粉症（かふんしょう, hay fever） | Cherry blossoms in full bloom |
| Summer | 夏（なつ） | June–August | 梅雨（つゆ, rainy season）, 蒸し暑い（むしあつい, muggy）, 台風（たいふう, typhoon）, 花火（はなび, fireworks）, 盆踊り（ぼんおどり, Bon dance） | Fireworks festivals and typhoon warnings |
| Autumn | 秋（あき） | September–November | 紅葉（こうよう, autumn leaves）, 涼しい（すずしい, cool）, 秋晴れ（あきばれ, clear autumn sky）, きのこ（mushroom）, お月見（おつきみ, moon viewing） | Vivid red and gold foliage in the mountains |
| Winter | 冬（ふゆ） | December–February | 雪（ゆき, snow）, 雪見（ゆきみ, snow viewing）, 寒い（さむい, cold）, 初雪（はつゆき, first snow）, こたつ（heated table） | Illuminations and hot spring retreats |
A few of these cultural words deserve a closer look:
- 花見（はなみ） — Literally “flower viewing,” this is the spring tradition of gathering under cherry blossoms with food, drinks, and friends. Companies, schools, and families all do hanami. Weather forecasts during late March through April include a special 桜前線（さくらぜんせん, cherry blossom front） — a moving weather line tracking where the blossoms will peak.
- 梅雨（つゆ） — The rainy season, typically mid-June to mid-July in most of Japan. It is not technically a season, but Japanese people treat it as one. Conversations during tsuyu almost always mention the rain.
- 紅葉（こうよう） — Autumn leaf color. Like hanami in spring, koyo viewing is a national pastime. Weather conditions (temperature swings, rainfall) determine how vivid the colors will be, and the news covers it seriously.
- 初雪（はつゆき） — The first snowfall of the season. This is emotionally significant in Japan — it often makes the news, and people comment on it warmly in conversation.
Yuka今年の桜、もう見に行った？(Did you go to see the cherry blossoms this year?)
Reiうん！先週末に上野公園で花見したよ。すごくきれいだった！(Yes! I did hanami at Ueno Park last weekend. It was so beautiful!)
Weather Forecast Vocabulary
Japanese weather forecasts use specific expressions that you won’t find in a basic vocabulary list. If you watch NHK or check a Japanese weather app, these are the phrases you need to know.
| Japanese | Reading | Meaning |
|---|---|---|
| 天気予報 | てんきよほう | weather forecast |
| 降水確率 | こうすいかくりつ | probability of precipitation (shown as a percentage, e.g. 60%) |
| 晴れのち曇り | はれのちくもり | sunny, then cloudy (の ち = “and then after”) |
| 曇りときどき雨 | くもりときどきあめ | cloudy with occasional rain (時々 = sometimes/occasionally) |
| 所により雨 | ところによりあめ | rain in some areas (所により = depending on the area) |
| 最高気温 | さいこうきおん | maximum temperature (high) |
| 最低気温 | さいていきおん | minimum temperature (low) |
| 気温 | きおん | air temperature |
| 湿度 | しつど | humidity |
| UV指数 | ユーブイしすう | UV index |
| 警報 | けいほう | warning (e.g. heavy rain warning) |
| 注意報 | ちゅういほう | advisory / watch (lower severity than 警報) |
| 避難指示 | ひなんしじ | evacuation order |
| 大雨 | おおあめ | heavy rain |
| 強風 | きょうふう | strong wind |
| 波浪注意報 | はろうちゅういほう | rough sea advisory |
Understanding 降水確率 (kousu kakuritsu): This is the percentage chance of measurable rainfall during a given time window. Japanese forecasts divide the day into blocks (usually 0–6, 6–12, 12–18, 18–24 hours), and each block has its own percentage. A forecast of 70% does not mean it will rain for 70% of the time — it means there is a 70% probability of at least 1mm of rain occurring in that block. Plan your outdoor activities accordingly.
Pattern: のち (nochi) vs 時々 (tokidoki) vs 一時 (ichiji)
- のち — A change that happens and stays. 晴れのち雨 means it starts sunny, then turns rainy and stays rainy.
- 時々 — Recurring but not constant. 晴れ時々曇り means mostly sunny with clouds coming and going repeatedly.
- 一時 — A single temporary period. 晴れ一時雨 means mostly sunny with one brief spell of rain.
Describing Temperature and Feeling
Japanese has several words for “hot,” “cold,” and “cool” that are not interchangeable. Using the wrong one is one of the most common mistakes English speakers make, so this section gives you both the forms and the nuance.
| Japanese | Reading | Meaning | Used for | Example |
|---|---|---|---|---|
| 暑い | あつい | hot (ambient) | weather, room temperature, the air | 今日は暑いね。(It’s hot today, huh.) |
| 熱い | あつい | hot (object) | food, drinks, surfaces you touch | このスープ、熱い！(This soup is hot!) |
| 寒い | さむい | cold (ambient) | weather, air, the outdoor environment | 今朝は寒かった。(It was cold this morning.) |
| 冷たい | つめたい | cold (object / touch) | drinks, water, a surface, a person’s attitude | このビール、冷たくておいしい！(This beer is cold and delicious!) |
| 涼しい | すずしい | cool / pleasantly cool | a comfortable cool feeling, typically autumn air or breeze | 今日は涼しくて気持ちいい。(It’s pleasantly cool today.) |
| 暖かい | あたたかい | warm / pleasantly warm | comfortable warmth, spring weather, warm objects | 春になって暖かくなってきた。(It’s gotten warm with the arrival of spring.) |
| 蒸し暑い | むしあつい | muggy / hot and humid | summer humidity, the “sticky” heat Japan is famous for | 今日は蒸し暑くて、外に出たくない。(It’s so muggy today, I don’t want to go outside.) |
| 肌寒い | はださむい | chilly / a bit cold on the skin | that slight chill when the season starts turning, or when a cool breeze hits you | 夕方になると肌寒くなってきた。(It’s gotten a bit chilly since evening.) |
The big distinction: 暑い vs 熱い and 寒い vs 冷たい share the same pronunciation but different kanji and different meanings. 暑い and 寒い are for the ambient environment — the air, the weather, the season. 熱い and 冷たい are for objects you can touch or that directly contact your body. A common beginner error is saying コーヒーが寒い to mean “the coffee is cold” — that sounds like the coffee is feeling chilly. The correct word is 冷たい (or for “the coffee has gone cold,” 冷めた, sameta).
Yuka外、どう？（How’s it outside?）
Reiめちゃくちゃ蒸し暑い！今日は35度あるらしいよ。（Super muggy! Apparently it’s 35 degrees today.）
Weather in Small Talk and Conversation
Weather openers are the single most common conversation starter in Japan. Even in formal business settings, it is normal to open with a weather comment before getting to the main topic. Learning to participate naturally in these exchanges makes a huge impression on native speakers.
Standard weather conversation openers:
| Japanese | English | Register |
|---|---|---|
| 今日は寒いですね。 | It’s cold today, isn’t it? | Polite (です/ます) |
| なんか今日寒いですね。 | Somehow it feels cold today, doesn’t it? | Polite, soft and natural-sounding |
| 今日、すごく暑くない？ | Isn’t it really hot today? | Casual |
| いい天気ですね。 | Nice weather, isn’t it? | Polite |
| 急に寒くなりましたね。 | It suddenly got cold, didn’t it? | Polite |
| また雨か… | Rain again, huh… | Casual / sighing |
| 今週ずっと雨みたいですね。 | It looks like it’ll rain all week, doesn’t it? | Polite |
| 今日は過ごしやすいですね。 | Today is easy to be outside in, isn’t it? (= pleasant weather) | Polite |
How to respond and agree:
- 本当ですね。 (hontou desu ne) — That’s true, isn’t it. / You’re right.
- そうですね。 (sou desu ne) — Yes, indeed. / I agree. (The most universal agreement filler in Japanese.)
- ほんとに。 (honto ni) — Seriously. / Really. (Casual)
- でも、明日は晴れるみたいですよ。 — But apparently it will clear up tomorrow. (A natural way to extend the conversation by adding a forecast detail.)
- 早く暖かくなるといいですね。 — I hope it warms up soon. (A warm, agreeable thing to say in winter or on a cold day.)
The ね (ne) particle in weather talk: Notice how almost every weather opener ends in ね. This particle invites the listener to agree, share the feeling, and confirm mutual understanding. It is the social glue of weather conversation. Dropping it makes the statement feel like a cold announcement rather than an invitation to connect. Always use ね when making a shared observation about the weather.
The pattern なんか + weather observation: Adding なんか (somehow / for some reason) before a weather statement softens it and makes it sound more natural and conversational. 「なんか今日寒いですね」sounds far more like something a real person says than 「今日は寒いです」alone.
Nature Vocabulary Connected to Weather
Weather does not happen in a vacuum — it interacts with landscape. Japanese nature vocabulary often appears alongside weather expressions, especially in travel, poetry (haiku), and descriptive speech. Knowing these words lets you describe what you see around you.
| Kanji | Reading | Meaning | Weather Connection |
|---|---|---|---|
| 空 | そら | sky | 青空（あおぞら, blue sky）; 曇り空（くもりぞら, cloudy sky）; 夕焼け空（ゆうやけぞら, sunset sky） |
| 雲 | くも | cloud | 積乱雲（せきらんうん, cumulonimbus / thundercloud）; 薄雲（うすぐも, thin cloud） |
| 山 | やま | mountain | 山の天気は変わりやすい (mountain weather changes easily) |
| 川 | かわ | river | 増水する (to swell after heavy rain); 氾濫（はんらん, flooding/overflow） |
| 海 | うみ | sea / ocean | 波（なみ, wave）; 荒れた海（あれたうみ, rough sea）; 波浪警報（はろうけいほう, rough sea warning） |
| 森 | もり | forest / woods | 霧がかかった森（きりがかかったもり, mist-covered forest） |
| 野原 | のはら | field / meadow | 雪が積もった野原（ゆきがつもったのはら, snow-covered field） |
| 池 | いけ | pond | 雨が降ると池の水が増える (pond water rises when it rains) |
| 滝 | たき | waterfall | 大雨の後は滝の水量が増える (waterfall volume increases after heavy rain) |
| 砂漠 | さばく | desert | 雨がほとんど降らない地域 (a region that almost never gets rain) |
Useful nature + weather collocations to memorize:
- 雨が降る（あめがふる）— rain falls
- 雪が積もる（ゆきがつもる）— snow accumulates / piles up
- 風が吹く（かぜがふく）— wind blows
- 霧がかかる（きりがかかる）— mist settles / fog rolls in
- 川が増水する（かわがぞうすいする）— a river swells (from rain)
- 空が晴れる（そらがはれる）— the sky clears up
- 雲が流れる（くもがながれる）— clouds drift
- 波が高い（なみがたかい）— waves are high
Weather Phrases for Travel
Whether you are checking the forecast before a day trip to Nikko, asking your hotel about tomorrow’s weather, or trying to figure out if that mountain hike is safe, these phrases will serve you in real situations.
Checking the forecast:
- 明日の天気はどうですか？ — What is tomorrow’s weather like?
- 今週末、雨が降りますか？ — Will it rain this weekend?
- 降水確率は何パーセントですか？ — What is the probability of rain?
- 台風は来ていますか？ — Is there a typhoon coming?
At the hotel front desk:
- 明日、外でハイキングしたいのですが、天気は大丈夫そうですか？ — I’d like to go hiking outside tomorrow — does the weather look okay?
- 傘を持って行ったほうがいいですか？ — Should I bring an umbrella?
- この辺の天気アプリでおすすめはありますか？ — Is there a weather app you’d recommend for this area?
Dealing with rain and typhoons:
- 雨でビショビショになってしまいました。 — I got completely soaked in the rain. (びしょびしょ = soaking wet, a very natural expression)
- 台風で電車が止まっているようです。 — It seems the trains have stopped because of the typhoon.
- 台風が来る前に早めに帰ったほうがいいですね。 — It’s probably best to head home early before the typhoon arrives.
- 急に雨が降ってきた。 — It suddenly started raining. (This one is a lifesaver when you’re caught without an umbrella and need to explain the situation quickly.)
Useful travel tip — 傘（かさ）culture: Japan has an extremely high umbrella culture. Convenience stores sell cheap umbrellas at all times. Most restaurants and shops have an umbrella stand (傘立て, かさたて) at the entrance. If rain is even a possibility, you will see most Japanese people carrying a folding umbrella (折りたたみ傘, おりたたみがさ). The phrase 「傘、持ってきた？」(Did you bring an umbrella?) is one of the most commonly heard weather-related exchanges.
Yuka明日、降水確率60%だって。傘持って行ったほうがいいよ。（They say there’s a 60% chance of rain tomorrow. You should bring an umbrella.）
Reiそうか、じゃあ折りたたみ傘を持って行くね。（I see. Then I’ll bring my folding umbrella.）
Common Mistakes English Speakers Make
Even intermediate learners trip over these. Here are the most frequent weather-related errors and how to fix them.
1. Using は vs が with weather
Both は and が can appear in weather sentences, but they are not interchangeable. The general rule for weather: use が when stating something as new information or a subject-predicate observation, and は when contrasting or when the subject has already been established.
- ✅ 雨が降っています。— It is raining. (Neutral observation — が is natural here)
- ✅ 今日は雨です。— Today it’s raining. / Today is a rainy day. (は sets up today as the topic)
- ❌ 雨は降っています。— This implies a contrast: “As for rain, it IS falling” — as if you expected it not to. Grammatically possible but contextually strange in most weather conversations.
The safest default: 雨が降っています (for “it is raining right now”) and 今日は〇〇です (for “today’s weather is X”).
2. Confusing 暑い and 熱い (both are あつい)
These are homonyms with different kanji and different meanings. 暑い is for the weather and environment (ambient heat). 熱い is for objects and things you touch or drink. Saying 「今日は熱い」to mean “today is hot” is technically understandable, but it sounds unnatural — as if the day itself has a high temperature you can touch.
Similarly, never say 「このコーヒーは寒い」to mean “this coffee is cold.” That makes the coffee sound like it is feeling winter. Use 冷たい for cold objects.
3. Mispronouncing or misreading 天気 (てんき)
天気（てんき, tenki）means “weather.” It is not 「でんき」(denki = electricity) — this is a very common slip by beginners because both have the same かな pattern if you miss the てん vs でん distinction. Say てんき clearly with an unvoiced T, not D.
Also: 天気 refers to weather in general, while 気候（きこう, kikou）means climate — the long-term pattern. Do not use 気候 when you mean today’s weather.
4. Translating “the weather is good” word-for-word
English speakers often produce 「天気はいいです」and while this is grammatically fine, the most natural Japanese phrasing varies. Here are the natural alternatives:
- いい天気ですね。— Nice weather, isn’t it. (Most natural opener)
- 今日は晴れてますね。— It’s sunny today, isn’t it.
- 今日は過ごしやすいですね。— Today is comfortable to be out in.
5. Forgetting ね in weather conversation
As noted in the small talk section, dropping ね from weather comments makes them sound blunt or robotic. 「今日は寒いです」sounds like a weather announcement. 「今日は寒いですね」sounds like a human being sharing an experience and inviting you to agree. Always add ね in weather small talk.
Quick Quiz
Test what you have learned. Choose the correct word or complete the sentence. Answers are below.
Question 1. You want to say “It’s really hot today, isn’t it?” (talking about the weather, not an object). Which word do you use?
a) 熱い b) 暑い c) 蒸し暑い
Question 2. The forecast says 晴れのち曇り. What does this mean?
a) Cloudy with occasional sunny spells
b) Sunny, then turning cloudy
c) Sometimes sunny, sometimes cloudy
Question 3. You want to say “The cold water feels good.” Which word do you use for “cold”?
a) 寒い b) 冷たい c) 涼しい
Question 4. Fill in the blank: 明日は雨が＿＿＿そうです。(It looks like it will rain tomorrow.)
a) 吹き b) 降り c) 積もり
Question 5. Which of the following is the most natural weather conversation opener in Japanese?
a) 今日の天気はいいです。
b) いい天気ですね。
c) 天気がよくあります。
Answers:
- Q1: b) 暑い — 暑い is for ambient weather heat. 熱い is for objects. 蒸し暑い is also about weather but specifically means hot and humid / muggy.
- Q2: b) Sunny, then turning cloudy — のち means “and then after that,” indicating a one-way change.
- Q3: b) 冷たい — 冷たい is for objects you touch or experience directly. 寒い is for the ambient environment. 涼しい means pleasantly cool.
- Q4: b) 降り — 雨が降る (ame ga furu, rain falls) is the standard verb. 降りそう = looks like it will fall/rain.
- Q5: b) いい天気ですね。 — This is the most natural phrasing. Option a) is grammatically correct but sounds stiff. Option c) is unnatural (よくあります does not work this way).
Leave a Comment!
What is your favourite season in Japan — or the one you most want to experience? Have you ever been caught in a typhoon or surprised by the humidity of a Japanese summer? Share your experience or any weather vocabulary questions in the comments below. We read every comment and love hearing from learners at every level.
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` only. – No raw emoji used anywhere. Checkmarks in quiz answers use HTML entities (✅ / ❌). – No H1 in body — title is frontmatter only. – H2 count: 10 (Why Weather Matters, Essential Weather Words, Seasons, Forecast Vocabulary, Temperature and Feeling, Small Talk, Nature Vocabulary, Travel Phrases, Common Mistakes, Quick Quiz) + Leave a Comment + Keep Learning = 12 H2 blocks total, all using `wp:heading {“level”:2}` format. – H3 subheadings used within Common Mistakes for the 5 error types — appropriate for scannability. – Tables included: Essential Weather Words, Seasons, Forecast Vocabulary, Temperature adjectives, Small Talk openers, Nature Vocabulary. – Word count estimate: approximately 3,100–3,300 words of content.