
英語ではこのフレーズがあります / We have an expression in English:
Red sky at night, shepherd’s delight. Red sky in the morning, shepherd’s warning.
バリエーションもあります / There are other versions too, for example:
Red sky at night, sailor’s delight. Red sky in the morning, sailor’s warning.

きっと明日はいい天気だっ!! / I think the weather is going to be great tomorrow!!
