It's October, but it still gets quite hot during the day.
Even though we're into October, the temperature still goes up pretty high in the afternoon.
ーIt's October, but it still gets quite hot during the day.
「１０月だけどまだ日中結構暑くなる」
to get hot で「暑くなる」
during the day で「日中」
ーEven though we're into October, the temperature still goes up pretty high in the afternoon.
「１０月に入ったのに、午後は気温がまだ結構高くなる」
temperature で「気温」
to go up で「上がる」
in the afternoon で「午後に」
ご参考まで！
カナダ 
