このにわか雨がやんだら、私たちは出かけるつもりです。

We'll go out when this shower is over.

このにわか雨(あめ)がやんだら、私(わたし)たちは出(で)かけるつもりです。

Kono niwakaame ga yandara, watashitachi wa dekakeru tsumori desu.

此の (この)

this (something or someone close to the speaker (including the speaker), or ideas expressed by the speaker)

俄雨 (にわかあめ)

rain shower

が (が)

indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and

止む (やむ)

to cease; to stop; to be over

私たち (わたしたち、わたくしたち)

we; us

は (は)

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

出かける (でかける)

to go out (e.g. on an excursion or outing); to leave; to depart; to start; to set out; to be about to leave; to be just going out

積もり (つもり)

intention; plan; conviction; belief

です (です)

be; is

Readings: ウ、あめ、あま-、 -さめ

Meaning: rain

Readings: シ、わたくし、わたし

Meanings: private, I, me

Readings: シュツ、スイ、で.る、 -で、だ.す、 -だ.す、い.でる、い.だす

Meanings: exit, leave, go out, come out, put out, protrude