非(ひ)常(じょう)に() hijouni天(てん)気(き) tenkiの noよい yoi日(ひ) hiだった dattaので node、私(わたし)た()ち() watashitachiは waとても totemo楽(たの)し()か()っ()た() tanoshikatta。 It was such a beautiful day that we had a wonderful time. Literal Extremely weather good day was [because-ので], we [topic-は] very were-happy. 非常に天気のよい日 is a nested modifier: 'an extremely good-weather day.' ~ので links the cause (good weather) to the result (having fun). weatherdaily life~ので (because)
非(ひ)常(じょう)に() hijouni天(てん)気(き) tenkiの noよい yoi日(ひ) hiだった dattaので node、私(わたし)た()ち() watashitachiは waとても totemo楽(たの)し()か()っ()た() tanoshikatta。 It was such a beautiful day that we had a wonderful time. Literal Extremely weather good day was [because-ので], we [topic-は] very were-happy. 非常に天気のよい日 is a nested modifier: 'an extremely good-weather day.' ~ので links the cause (good weather) to the result (having fun). weatherdaily life~ので (because)