油あぶら照でり

noun, noun which may take the genitive case particle 'no'

sultry weather; hot and muggy with light overcast

Describes oppressive summer heat when the sky is slightly overcast, there is little wind, and humidity is high. Often used in weather reports or seasonal descriptions.

• 今日きょうは朝あさから油あぶら照でりで、じっとしていても汗あせが出でる。

  It's been sultry since this morning; I'm sweating even when I stay still.

• 油あぶら照でりの午ご後ご、遠とおくで雷かみなりの音おとが聞きこえた。

  On that sultry afternoon, I heard thunder in the distance.