和彩虹有關：
chase rainbows做白日夢
Chasing rainbows won't get you anywhere.

和風有關：
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：
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.

和天氣有關：
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.