クソ暑い

くそあつい

extremely hot

蒸し暑い

むしあつい

humid, sultry

暑い盛り

あついさかり

heat of the day, hottest part of the day

長く暑い夏

ながくあついなつ

Long, hot summer (of 1967, when race riots occurred in many cities in the US)

暑

しょ

heat

秋暑

しゅうしょ

lingering heat (in autumn)

暑中

しょちゅう

mid-summer

極暑

ごくしょ ごく しょ

intense heat, hottest season, peak of summer's heat

向暑

こうしょ

facing the heat

防暑

ぼうしょ

protection against heat

厳暑

げんしょ

extreme heat

盛暑

せいしょ

height of summer

処暑

しょしょ

"limit of heat" solar term (approx. Aug. 23, when the weather is said to start cooling down)

耐暑

resistance to heat

大暑

たいしょ

blistering heat

避暑

ひしょ

summering, going to a summer resort

暑熱

しょねつ

heat of summer

溽暑

sultry; muggy; steamy; sticky; hot and humid

薄暑

はくしょ

light heat at the beginning of the summer