和天氣有關(guān)：

　　fair-weather friend泛泛之交

　　A true friend is the one who shows up when you are in trouble, a fair-weather friend is the one who shows up when you are in happiness.

　　和雨有關(guān)：

　　Save for a rainy day未雨綢繆

　　We save money for a rainy day.

　　It never rains but it pours不雨則以，一雨驚人

　　I just got sacked and my wife left me!So it never rains but it pours!

　　right as rain身體健康，一切正常

　　I was sick，but now I feel as right as rain.

　　和云有關(guān)：

　　on cloud nine 飄飄然如上九重天

　　She passed the audition and now she is on cloud nine.

　　head in the cloud不切實際，好高騖遠

　　You can't always have your head in the cloud，you need to be down-to-earth.

　　和彩虹有關(guān)：

　　chase rainbows做白日夢

　　Chasing rainbows won't get you anywhere.

　　和風(fēng)有關(guān)：

　　sail close to the wind冒險

　　If you believe what he said， you are sailing close to the wind.

　　know which way the wind blows了解情況

　　He never tells his thoughts until he knows which way the wind blows.

　　和雪有關(guān)：

　　be snowed down工作太多做不過來

　　I've been snowed down by my work!

　　white as snow純潔無辜

　　The accused didn't commit the murder，he is as white as snow.