Verified answer

Perfect. every japanese can understand this sentence.

Today's weather was very cold = 今日の天気はとても寒かったです。

That cloud looks like a dog = あの雲は犬に似ています

FYI

似ています is not so cool, not so usual in conversation, but you can use this.

If you would like to be cool,

あの雲、犬に見える

is better

your first sentence is correct.