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In a weather forecast, use 「～から～にかけて」 to describe roughly when rain is expected.

Lesson notes · ≈ JLPT N3 · Intermediate 1

〜から〜にかけて~kara ~ni kakete

approximate time or place range

Use 〜から〜にかけて for an approximate span of time or place, without stressing exact boundaries or continuous events.

How it works

In a weather forecast, use 「～から～にかけて」 to describe roughly when rain is expected.
The blue band fades at both ends: it shows an approximate range, without emphasizing an exact start or end.
You can use it for places too. The blue rain area stretches from around Kanto to around Tohoku.
Use nouns for times or places on both sides: starting point ＋から＋ ending point ＋にかけて.
Compared with 「から～まで」, this pattern focuses more on an overall range, with less precise boundaries.

The example about tonight through tomorrow morning says rain is expected during that period. It does not guarantee continuous rain throughout.

The Kanto-to-Tohoku example describes the area affected by heavy rain, not rain moving from Kanto to Tohoku.

今夜こんやkonyaからkara明日あすasuのno朝あさasaにniかけkakeて、te、雨あめameがga降るでしょう。ふるでしょう。furudeshou。
It will probably rain from tonight through tomorrow morning.
関東かんとうkantou地方ちほうchihouからkara東北とうほくtouhoku地方ちほうchihouにniかけkakeて、te、大雨おおあめooameにniなるnaruおそれosore

A
この地域ちいきは、わ、いつからいつにかけて雨あめが多いですおおいですか。
A: From when to when does this area get a lot of rain?
B
だいたい6ろく月がつから7しち月がつにかけて、大雨おおあめの日ひが多くおおくなります。
B: Generally from June through July, there are many days of heavy rain.
A
そうですか。じゃあ、その時期じきはわレインコートれいんこーとが必要ひつようですね。
A: I see. Then you'll need a raincoat during that period, right?

Level 1 · Recognise
Which sentence is correct?
Level 1 · Recognise
Listen and choose the meaning
Level 2 · Build
Put the words in order
It will probably rain from tonight through tomorrow morning.
Level 3 · Use
What goes in the blank?
今夜____、雨が強くなるでしょう。
The rain will get heavier from tonight to tomorrow morning.

がga

あります。arimasu。

There is a risk of heavy rain from the Kanto region to the Tohoku region.