In 15 Seconds
- Standard phrase for a hot day.
- Used for weather, not hot objects.
- Common in daily conversation.
- Opposite of a cold day.
Meaning
This is the most straightforward way to describe a day that's hot. Think of it as the default setting for talking about sweltering weather. It carries a sense of shared experience, like everyone is feeling this heat together.
Key Examples
3 of 12Texting a friend about the weekend plans
週末は暑い日になりそうだから、家でゆっくりしよう。
It looks like it's going to be a hot day this weekend, so let's just relax at home.
Instagram caption for a summer photo
夏の思い出。こんな暑い日も、今となっては懐かしい。
Summer memories. Even days like this, which were hot, are nostalgic now.
Ordering iced coffee at a café
今日は本当に暑い日ですね。アイスコーヒーをお願いします。
It's really a hot day today, isn't it? I'll have an iced coffee, please.
Cultural Background
The 'Day of the Ox' (Doyo no Ushi no Hi) is a specific hot day in summer when everyone eats grilled eel to gain stamina. The 'Heat Island' effect makes hot days in Tokyo feel much hotter due to concrete and AC units. On hot days, schools often fly a 'heatstroke warning flag' to tell kids they can't play outside. 'Cool Biz' is a government campaign allowing workers to ditch ties and jackets on hot days.
The 'Ne' Trick
Always add 'ne' at the end ({暑|あつ}い{日|ひ}ですね) when talking to others. It invites them to agree and is the most natural way to start a conversation.
Kanji Caution
If you type 'atsui' on a keyboard, you will see 暑, 熱, and 厚. Always pick 暑 for weather!
In 15 Seconds
- Standard phrase for a hot day.
- Used for weather, not hot objects.
- Common in daily conversation.
- Opposite of a cold day.
What It Means
暑い日 (atsui hi) is your go-to phrase for a hot day. It's super common and easy to understand. It means exactly what it sounds like: a day with high temperatures. It's the standard way to talk about the summer heat. You'll hear it everywhere, from casual chats to weather reports. It’s the neutral setting for describing heat.
How To Use It
Just pop it into a sentence when you're talking about the weather. You can use it to describe the current day or a past day. It works perfectly in simple statements. Think of it like saying 'It's a hot day today.' You can also use it to set a scene in a story. It’s very flexible for everyday conversation. You can even use it with a sigh. That sigh really sells the heat.
Real-Life Examples
- "Today is a hot day."
今日は暑い日ですね。(Kyou wa atsui hi desu ne.) - "It was a hot day yesterday too."
昨日も暑い日でした。(Kinou mo atsui hi deshita.) - "I hate hot days."
暑い日は嫌いです。(Atsui hi wa kirai desu.) - "Let's avoid going out on such a hot day."
こんな暑い日には外出を避けましょう。(Konna atsui hi ni wa gaishutsu o sakemashou.) - "Summer has many hot days."
夏には暑い日が多いです。(Natsu ni wa atsui hi ga ooi desu.)
When To Use It
Use 暑い日 when you want to clearly state that the day is hot. This is perfect for small talk. It's great for complaining about the weather with friends. You can use it in texts or social media posts. It fits perfectly in travel diaries. It's also fine in slightly more formal settings, like a casual office chat. Basically, if it's hot, you can say it's an 暑い日.
When NOT To Use It
Avoid using 暑い日 for extremely cold days. That would be… confusing. Also, don't use it for humid days if the temperature isn't actually high. 暑い日 specifically refers to temperature. It's not for windy days either. If you want to talk about cold, use 寒い日 (samui hi). Don't mix them up, or you'll sound like you're lost in translation. It’s also not the best for very technical or scientific descriptions of heat. That requires more specific terms.
Common Mistakes
Learners sometimes mix up 暑い (atsui - hot weather) with 熱い (atsui - hot object). This is a classic! Using 熱い日 for a hot day is incorrect. 熱い refers to things you can touch, like soup or a heater. It’s like trying to describe a sunny day by saying 'bright moon.' It just doesn't fit the context. Another mistake is overusing it when a simpler 'it's hot' (暑い - atsui) is enough.
熱い日
✓暑い日
今日は熱いですね
✓今日は暑いですね
Similar Expressions
猛暑日(mousho-bi): This means 'scorching day' or 'extreme heat day.' It's much stronger than暑い日. Think above 35°C (95°F). It’s for when you’re really suffering.真夏日(manatsu-bi): This means 'midsummer day.' It refers to days where the temperature reaches 30°C (86°F) or higher. It’s a bit more specific than just 'hot.'酷暑(koku-sho): This is a more formal or literary term for extreme heat. You might see it in news reports or literature, not usually in casual chat. It sounds quite serious.
Common Variations
暑い一日(atsui ichinichi): This means 'a hot day' but emphasizes the duration of the day.一日(ichinichi) means 'one day' or 'a whole day.' It's like saying 'It was a hot day *all day long*.'暑い夏の日(atsui natsu no hi): This specifies 'a hot summer day.' It adds clarity if you need to be precise about the season.暑い時期(atsui jiki): This means 'hot period' or 'hot season.' It refers to a span of time, not just a single day. Useful for planning vacations!
Memory Trick
Picture a hot day where you're sweating buckets. You yell, "Ah, tsuck! This hit is unbearable!" The "Ah, tsuck!" sounds like atsui, and "hi" sounds like 'heat' or 'day.' You're stuck in the hot day! It’s a bit dramatic, but it works. Remember, 暑い is for weather, 熱い is for touching. Don't burn your toast and call it a 暑い日!
Quick FAQ
- Is
暑い日formal or informal? It's pretty neutral. You can use it in most everyday situations. - Can I use
暑い日for a hot object? No! That's a common mistake. Use熱い(atsui) for hot things you touch.暑いis strictly for weather. - What's the opposite of
暑い日? The opposite is寒い日(samui hi), meaning 'a cold day.'
Usage Notes
This phrase is generally neutral in formality and widely applicable. The main pitfall is confusing `暑い` (weather) with `熱い` (objects). Always use `暑い` for weather conditions. Adding particles like `は` (wa) or `には` (ni wa) can refine the sentence structure depending on the context.
The 'Ne' Trick
Always add 'ne' at the end ({暑|あつ}い{日|ひ}ですね) when talking to others. It invites them to agree and is the most natural way to start a conversation.
Kanji Caution
If you type 'atsui' on a keyboard, you will see 暑, 熱, and 厚. Always pick 暑 for weather!
Small Talk is Key
In Japan, talking about the heat isn't boring—it's polite. Don't be afraid to say it multiple times a day!
Examples
12週末は暑い日になりそうだから、家でゆっくりしよう。
It looks like it's going to be a hot day this weekend, so let's just relax at home.
Used to explain a change of plans due to the weather.
夏の思い出。こんな暑い日も、今となっては懐かしい。
Summer memories. Even days like this, which were hot, are nostalgic now.
Reflecting on past hot days with fondness.
今日は本当に暑い日ですね。アイスコーヒーをお願いします。
It's really a hot day today, isn't it? I'll have an iced coffee, please.
Making small talk with the barista about the weather.
本日はお忙しいところ、お越しいただきありがとうございます。こちらは大変暑い日ですが、面接の機会をいただけて光栄です。
Thank you for coming today despite your busy schedule. It's quite a hot day here, but I'm honored to have this interview opportunity.
Acknowledging the weather politely while maintaining professionalism.
沖縄旅行は、毎日が暑い日でした！でも楽しかったです。
My Okinawa trip was a hot day every single day! But it was fun.
Describing the overall weather conditions of a trip.
Wow, that looks amazing! It seems like a really暑い日 there.
Wow, that looks amazing! It seems like a really hot day there.
Using the phrase in a comment, though a native might prefer a full Japanese sentence.
✗ 昨日買ったマグカップは熱い日だった。 → ✓ 昨日買ったマグカップは熱かった。
✗ The mug I bought yesterday was a hot day. → ✓ The mug I bought yesterday was hot.
Confusing weather heat (`暑い`) with object heat (`熱い`). The second part corrects it to just describe the mug.
✗ この暑い日はスープが冷めないね。 → ✓ この熱い日はスープが冷めないね。
✗ This hot day, the soup doesn't cool down. → ✓ This hot soup doesn't cool down.
The first sentence makes no sense. The second uses `熱い` (hot object) correctly for soup.
もう勘弁してくれ！こんな暑い日がいつまで続くんだ？
Give me a break already! How long will hot days like this continue?
Exaggerated complaint, common in casual conversation among friends.
今日は本当に暑い日でしたが、チームのおかげで乗り越えられました。
It was a really hot day today, but thanks to the team, we got through it.
Using the phrase to describe a difficult day where the heat was a factor.
来週のピクニック、もし暑い日だったらどうしよう？
What should we do if it turns out to be a hot day for next week's picnic?
Expressing concern about potential weather conditions.
明日は全国的に暑い日となる見込みです。
Tomorrow is expected to be a hot day nationwide.
A typical phrase used in weather reports.
Test Yourself
Which kanji is correct for 'a hot day'?
今日は（ ）日ですね。
暑い is for weather, 熱い is for objects, 厚い is for thickness.
Complete the sentence to say 'Yesterday was a hot day.'
昨日（ ）日でした。
The past tense of the i-adjective 'atsui' is 'atsukatta'.
Choose the most natural response.
A: 今日は暑い日ですね。 B: （ ）
Agreeing with a weather comment is the standard social response.
Match the phrase to the situation.
You want to say 'I don't like hot days.'
Kirai means dislike/hate.
🎉 Score: /4
Visual Learning Aids
Practice Bank
4 exercises今日は（ ）日ですね。
暑い is for weather, 熱い is for objects, 厚い is for thickness.
昨日（ ）日でした。
The past tense of the i-adjective 'atsui' is 'atsukatta'.
A: 今日は暑い日ですね。 B: （ ）
Agreeing with a weather comment is the standard social response.
You want to say 'I don't like hot days.'
Kirai means dislike/hate.
🎉 Score: /4
Video Tutorials
Find video tutorials on YouTube for this phrase.
Frequently Asked Questions
10 questionsNo, that would be misunderstood. Use 'ikemen' for a handsome man or 'sekushii' for sexy.
暑い is for air/weather. 熱い is for things you touch (coffee, soup, iron).
Yes! In fact, just saying '{暑|あつ}いー！' (Atsuiii!) is very common when you're feeling the heat.
Use '{暑|あつ}くなってきました' (Atsuku natte kimashita).
It's an extremely hot day, specifically over 35 degrees Celsius.
No, use 'karai' ({辛|から}い) for spicy food.
It's neutral. To make it formal, add 'desu' or use seasonal greetings.
Add the particle 'ni': {暑|あつ}い{日|ひ}に.
{寒|さむ}い{日|ひ} (Samui hi) for a cold day.
It's a cultural way to show empathy and shared experience without being intrusive.
Related Phrases
{暑中見舞|しょちゅうみま}い
specialized formSummer greeting card
{猛暑|もうしょ}
builds onExtreme heat
{夏日|なつび}
similarSummer day
{涼|すず}しい{日|ひ}
contrastCool day
